21029140

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{1567}}^1$

素因数の和:1648

約数の個数: 48

約数和(自身を含む): 48996864

約数和(自身を除く): 27967724

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 61, 110, 122, 220, 244, 305, 610, 671, 1220, 1342, 1567, 2684, 3134, 3355, 6268, 6710, 7835, 13420, 15670, 17237, 31340, 34474, 68948, 86185, 95587, 172370, 191174, 344740, 382348, 477935, 955870, 1051457, 1911740, 2102914, 4205828, 5257285, 10514570, 21029140]

約数ペア:

[(1, 21029140), (2, 10514570), (4, 5257285), (5, 4205828), (10, 2102914), (11, 1911740), (20, 1051457), (22, 955870), (44, 477935), (55, 382348), (61, 344740), (110, 191174), (122, 172370), (220, 95587), (244, 86185), (305, 68948), (610, 34474), (671, 31340), (1220, 17237), (1342, 15670), (1567, 13420), (2684, 7835), (3134, 6710), (3355, 6268)]