20542390

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{43}}^2\times {\mathrm{101}}^1$

素因数の和:205

約数の個数: 48

約数和(自身を含む): 41706576

約数和(自身を除く): 21164186

約数列:

[1, 2, 5, 10, 11, 22, 43, 55, 86, 101, 110, 202, 215, 430, 473, 505, 946, 1010, 1111, 1849, 2222, 2365, 3698, 4343, 4730, 5555, 8686, 9245, 11110, 18490, 20339, 21715, 40678, 43430, 47773, 95546, 101695, 186749, 203390, 238865, 373498, 477730, 933745, 1867490, 2054239, 4108478, 10271195, 20542390]

約数ペア:

[(1, 20542390), (2, 10271195), (5, 4108478), (10, 2054239), (11, 1867490), (22, 933745), (43, 477730), (55, 373498), (86, 238865), (101, 203390), (110, 186749), (202, 101695), (215, 95546), (430, 47773), (473, 43430), (505, 40678), (946, 21715), (1010, 20339), (1111, 18490), (1849, 11110), (2222, 9245), (2365, 8686), (3698, 5555), (4343, 4730)]