20013620

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{90971}}^1$

素因数の和:90991

約数の個数: 24

約数和(自身を含む): 45849888

約数和(自身を除く): 25836268

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 90971, 181942, 363884, 454855, 909710, 1000681, 1819420, 2001362, 4002724, 5003405, 10006810, 20013620]

約数ペア:

[(1, 20013620), (2, 10006810), (4, 5003405), (5, 4002724), (10, 2001362), (11, 1819420), (20, 1000681), (22, 909710), (44, 454855), (55, 363884), (110, 181942), (220, 90971)]