21820808

素因数分解:

$2^3\times {\mathrm{659}}^1\times {\mathrm{4139}}^1$

素因数の和:4804

約数の個数: 16

約数和(自身を含む): 40986000

約数和(自身を除く): 19165192

約数列:

[1, 2, 4, 8, 659, 1318, 2636, 4139, 5272, 8278, 16556, 33112, 2727601, 5455202, 10910404, 21820808]

約数ペア:

[(1, 21820808), (2, 10910404), (4, 5455202), (8, 2727601), (659, 33112), (1318, 16556), (2636, 8278), (4139, 5272)]