18980390

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^2\times {\mathrm{1021}}^1$

素因数の和:1065

約数の個数: 48

約数和(自身を含む): 40397616

約数和(自身を除く): 21417226

約数列:

[1, 2, 5, 10, 11, 13, 22, 26, 55, 65, 110, 130, 143, 169, 286, 338, 715, 845, 1021, 1430, 1690, 1859, 2042, 3718, 5105, 9295, 10210, 11231, 13273, 18590, 22462, 26546, 56155, 66365, 112310, 132730, 146003, 172549, 292006, 345098, 730015, 862745, 1460030, 1725490, 1898039, 3796078, 9490195, 18980390]

約数ペア:

[(1, 18980390), (2, 9490195), (5, 3796078), (10, 1898039), (11, 1725490), (13, 1460030), (22, 862745), (26, 730015), (55, 345098), (65, 292006), (110, 172549), (130, 146003), (143, 132730), (169, 112310), (286, 66365), (338, 56155), (715, 26546), (845, 22462), (1021, 18590), (1430, 13273), (1690, 11231), (1859, 10210), (2042, 9295), (3718, 5105)]