21090992

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{101399}}^1$

素因数の和:101420

約数の個数: 20

約数和(自身を含む): 44007600

約数和(自身を除く): 22916608

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 101399, 202798, 405596, 811192, 1318187, 1622384, 2636374, 5272748, 10545496, 21090992]

約数ペア:

[(1, 21090992), (2, 10545496), (4, 5272748), (8, 2636374), (13, 1622384), (16, 1318187), (26, 811192), (52, 405596), (104, 202798), (208, 101399)]