21399404

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{411527}}^1$

素因数の和:411544

約数の個数: 12

約数和(自身を含む): 40329744

約数和(自身を除く): 18930340

約数列:

[1, 2, 4, 13, 26, 52, 411527, 823054, 1646108, 5349851, 10699702, 21399404]

約数ペア:

[(1, 21399404), (2, 10699702), (4, 5349851), (13, 1646108), (26, 823054), (52, 411527)]