19891980

素因数分解:

$2^2\times 3^5\times 5^1\times {\mathrm{4093}}^1$

素因数の和:4117

約数の個数: 72

約数和(自身を含む): 62589072

約数和(自身を除く): 42697092

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 27, 30, 36, 45, 54, 60, 81, 90, 108, 135, 162, 180, 243, 270, 324, 405, 486, 540, 810, 972, 1215, 1620, 2430, 4093, 4860, 8186, 12279, 16372, 20465, 24558, 36837, 40930, 49116, 61395, 73674, 81860, 110511, 122790, 147348, 184185, 221022, 245580, 331533, 368370, 442044, 552555, 663066, 736740, 994599, 1105110, 1326132, 1657665, 1989198, 2210220, 3315330, 3978396, 4972995, 6630660, 9945990, 19891980]

約数ペア:

[(1, 19891980), (2, 9945990), (3, 6630660), (4, 4972995), (5, 3978396), (6, 3315330), (9, 2210220), (10, 1989198), (12, 1657665), (15, 1326132), (18, 1105110), (20, 994599), (27, 736740), (30, 663066), (36, 552555), (45, 442044), (54, 368370), (60, 331533), (81, 245580), (90, 221022), (108, 184185), (135, 147348), (162, 122790), (180, 110511), (243, 81860), (270, 73674), (324, 61395), (405, 49116), (486, 40930), (540, 36837), (810, 24558), (972, 20465), (1215, 16372), (1620, 12279), (2430, 8186), (4093, 4860)]