20851870

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{5531}}^1$

素因数の和:5580

約数の個数: 32

約数和(自身を含む): 41821920

約数和(自身を除く): 20970050

約数列:

[1, 2, 5, 10, 13, 26, 29, 58, 65, 130, 145, 290, 377, 754, 1885, 3770, 5531, 11062, 27655, 55310, 71903, 143806, 160399, 320798, 359515, 719030, 801995, 1603990, 2085187, 4170374, 10425935, 20851870]

約数ペア:

[(1, 20851870), (2, 10425935), (5, 4170374), (10, 2085187), (13, 1603990), (26, 801995), (29, 719030), (58, 359515), (65, 320798), (130, 160399), (145, 143806), (290, 71903), (377, 55310), (754, 27655), (1885, 11062), (3770, 5531)]