20111980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{97}}^1\times {\mathrm{1481}}^1$

素因数の和:1594

約数の個数: 48

約数和(自身を含む): 48799296

約数和(自身を除く): 28687316

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 97, 140, 194, 388, 485, 679, 970, 1358, 1481, 1940, 2716, 2962, 3395, 5924, 6790, 7405, 10367, 13580, 14810, 20734, 29620, 41468, 51835, 103670, 143657, 207340, 287314, 574628, 718285, 1005599, 1436570, 2011198, 2873140, 4022396, 5027995, 10055990, 20111980]

約数ペア:

[(1, 20111980), (2, 10055990), (4, 5027995), (5, 4022396), (7, 2873140), (10, 2011198), (14, 1436570), (20, 1005599), (28, 718285), (35, 574628), (70, 287314), (97, 207340), (140, 143657), (194, 103670), (388, 51835), (485, 41468), (679, 29620), (970, 20734), (1358, 14810), (1481, 13580), (1940, 10367), (2716, 7405), (2962, 6790), (3395, 5924)]