213620

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{971}}^1$

素因数の和:991

約数の個数: 24

約数和(自身を含む): 489888

約数和(自身を除く): 276268

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 971, 1942, 3884, 4855, 9710, 10681, 19420, 21362, 42724, 53405, 106810, 213620]

約数ペア:

[(1, 213620), (2, 106810), (4, 53405), (5, 42724), (10, 21362), (11, 19420), (20, 10681), (22, 9710), (44, 4855), (55, 3884), (110, 1942), (220, 971)]