20663240

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{503}}^1$

素因数の和:606

約数の個数: 64

約数和(自身を含む): 50803200

約数和(自身を除く): 30139960

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 79, 104, 130, 158, 260, 316, 395, 503, 520, 632, 790, 1006, 1027, 1580, 2012, 2054, 2515, 3160, 4024, 4108, 5030, 5135, 6539, 8216, 10060, 10270, 13078, 20120, 20540, 26156, 32695, 39737, 41080, 52312, 65390, 79474, 130780, 158948, 198685, 261560, 317896, 397370, 516581, 794740, 1033162, 1589480, 2066324, 2582905, 4132648, 5165810, 10331620, 20663240]

約数ペア:

[(1, 20663240), (2, 10331620), (4, 5165810), (5, 4132648), (8, 2582905), (10, 2066324), (13, 1589480), (20, 1033162), (26, 794740), (40, 516581), (52, 397370), (65, 317896), (79, 261560), (104, 198685), (130, 158948), (158, 130780), (260, 79474), (316, 65390), (395, 52312), (503, 41080), (520, 39737), (632, 32695), (790, 26156), (1006, 20540), (1027, 20120), (1580, 13078), (2012, 10270), (2054, 10060), (2515, 8216), (3160, 6539), (4024, 5135), (4108, 5030)]