how many teams have gotten 20 wins before 1 loss in history

The Boston Celtics have won 3,709 times when losing 1+ game all-time.

Interpreted as:

How many teams have gotten 20 or more regular-season wins before 1 or more loss in history?

	TEAM	W	L	GP	MPG	PPG	RPG	APG	SPG	BPG	FGM	FGA	FG%	3PM	3PA	3P%	FTM	FTA	FT%	TS%	OREB	DREB	MIN	PTS	REB	AST	STL	BLK	PF
1	Celtics	3,709	2,510	6,219	241.6	105.5	50.2	23.8	8.1	4.9	40.4	90.5	44.6	6.3	17.6	35.7	21.0	27.7	75.9	51.4	12.2	31.7	1,502,585	655,929	300,580	148,124	34,118	20,461	144,816
2	Stags	145	92	237	241.6	79.0		14.6			30.3	95.5	31.7				18.5	27.7	66.6	36.7			57,255	18,727		3,454			6,319
3	Rebels	30	30	60	242.1	70.9		8.2			27.9	95.0	29.4				15.1	23.8	63.2	33.6			14,525	4,251		494			1,246
4	Falcons	20	40	60	240.4	63.3		8.0			24.0	97.4	24.6				15.4	24.9	61.8	29.2			14,425	3,797		482			1,351
5	Knicks	3,040	3,169	6,209	241.9	102.3	47.9	22.3	7.9	4.3	39.1	87.7	44.5	6.0	16.8	35.4	20.6	27.7	74.5	51.2	12.2	30.5	1,501,985	635,055	285,836	138,244	33,254	18,286	149,384
6	Warriors	3,028	3,180	6,209	241.6	105.9	50.2	23.5	8.8	5.1	40.5	91.3	44.3	6.6	18.2	36.2	21.0	28.3	74.1	51.0	13.3	31.1	1,499,860	657,657	299,775	146,067	37,050	21,287	146,138
7	Steam Rollers	46	122	168	241.6	73.7		11.0			27.7	93.1	29.7				18.3	27.9	65.8	35.0			40,595	12,375		1,854			3,669
8	Bombers	122	115	237	242.4	72.0		12.9			26.6	86.0	30.9				18.8	27.7	67.9	36.7			57,455	17,053		3,064			5,360
9	Huskies	22	38	60	240.4	66.6		7.7			25.3	94.5	26.7				16.1	25.9	62.2	31.4			14,425	3,996		463			1,271
10	Capitols	157	114	271	241.3	77.2	43.8	12.2			28.0	90.2	31.1				21.2	28.8	73.5	37.5			65,390	20,920	1,534	3,296			6,825
11	Bullets	158	292	450	242.2	79.8	52.4	18.2			28.2	82.6	34.2				23.4	32.7	71.5	41.2			108,970	35,901	14,367	8,170			11,975
12	Pistons	2,889	3,214	6,103	241.6	102.5	48.4	22.1	7.8	4.9	39.0	88.3	44.2	5.4	15.6	34.8	21.1	28.5	74.0	50.8	13.0	30.3	1,474,395	625,349	288,925	134,616	32,972	20,674	143,431
13	Lakers	3,616	2,492	6,108	241.7	106.8	49.2	24.1	8.3	5.5	40.8	89.0	45.8	5.8	16.8	34.7	21.6	29.0	74.5	52.5	12.5	31.7	1,476,470	652,040	294,291	147,171	34,918	23,135	137,629
14	Kings	2,793	3,316	6,109	241.7	105.1	47.8	23.6	8.2	4.6	40.1	88.8	45.2	5.7	16.0	35.6	21.4	28.5	75.0	51.9	12.3	30.6	1,476,560	642,119	285,996	144,431	34,654	19,325	145,797
15	Packers	37	27	64	244.3	87.3		19.4			30.4	97.7	31.1				26.6	36.6	72.7	38.4			15,635	5,589		1,240			1,806
16	Olympians	132	137	269	242.6	81.1	45.8	20.0			29.5	81.0	36.4				22.1	30.8	71.8	42.9			65,260	21,817	9,393	5,368			6,596
17	Red Skins	22	40	62	240.0	82.4		20.6			27.9	81.0	34.4				26.7	37.7	70.7	42.2			14,880	5,108		1,279			1,766
18	76ers	3,138	2,907	6,045	241.7	104.8	48.7	22.8	8.8	5.5	39.5	88.3	44.7	5.1	14.9	34.4	22.6	30.1	75.1	51.6	12.7	30.8	1,461,250	633,464	291,496	137,885	36,925	23,089	140,612
19	Hawks	2,980	3,063	6,044	241.6	103.3	48.4	22.9	8.3	5.0	39.0	87.5	44.6	5.8	16.5	35.1	21.7	29.0	74.8	51.5	13.0	30.3	1,460,105	624,186	289,141	138,119	35,148	21,277	142,819
20	Wizards	2,293	2,897	5,190	241.6	104.9	46.7	22.8	7.9	5.0	40.7	89.1	45.6	5.1	14.8	34.4	19.9	26.8	74.3	52.0	12.5	30.7	1,254,050	544,251	242,569	118,542	33,373	20,994	117,464
21	Bulls	2,431	2,353	4,784	241.8	103.0	45.4	23.8	8.0	4.8	39.7	86.4	45.9	5.3	14.9	35.4	19.6	25.9	75.8	52.7	12.8	31.1	1,156,860	492,875	217,137	114,097	33,556	20,318	106,729
22	Rockets	2,436	2,272	4,708	241.5	105.8	45.3	23.5	8.1	5.1	40.2	87.4	46.0	7.0	20.0	35.0	19.8	26.3	75.3	53.5	12.7	31.2	1,137,170	497,901	213,437	110,437	34,115	21,600	104,860
23	Thunder	2,560	2,151	4,711	241.6	106.3	44.8	23.4	8.8	5.0	40.6	87.4	46.4	6.0	17.0	35.4	20.4	26.9	75.9	53.5	13.0	30.6	1,138,315	500,660	211,051	110,289	37,093	21,038	108,264
24	Bucks	2,447	2,184	4,631	241.6	105.4	43.7	24.2	8.4	4.9	40.8	86.6	47.0	6.0	16.6	36.0	19.1	25.3	75.6	53.9	12.3	30.5	1,118,815	488,232	202,453	112,234	35,426	20,582	105,846
25	Suns	2,478	2,152	4,630	241.5	108.0	44.0	25.2	8.4	4.9	41.4	87.4	47.3	6.1	17.0	36.0	20.3	26.6	76.5	54.5	12.1	31.2	1,118,050	499,902	203,918	116,476	35,457	20,573	104,905