21163790

素因数分解:

$2^1\times 5^1\times {\mathrm{41}}^2\times {\mathrm{1259}}^1$

素因数の和:1348

約数の個数: 24

約数和(自身を含む): 39077640

約数和(自身を除く): 17913850

約数列:

[1, 2, 5, 10, 41, 82, 205, 410, 1259, 1681, 2518, 3362, 6295, 8405, 12590, 16810, 51619, 103238, 258095, 516190, 2116379, 4232758, 10581895, 21163790]

約数ペア:

[(1, 21163790), (2, 10581895), (5, 4232758), (10, 2116379), (41, 516190), (82, 258095), (205, 103238), (410, 51619), (1259, 16810), (1681, 12590), (2518, 8405), (3362, 6295)]