21990704

素因数分解:

$2^4\times {\mathrm{113}}^1\times {\mathrm{12163}}^1$

素因数の和:12284

約数の個数: 20

約数和(自身を含む): 42987576

約数和(自身を除く): 20996872

約数列:

[1, 2, 4, 8, 16, 113, 226, 452, 904, 1808, 12163, 24326, 48652, 97304, 194608, 1374419, 2748838, 5497676, 10995352, 21990704]

約数ペア:

[(1, 21990704), (2, 10995352), (4, 5497676), (8, 2748838), (16, 1374419), (113, 194608), (226, 97304), (452, 48652), (904, 24326), (1808, 12163)]