21960016

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{1487}}^1$

素因数の和:1579

約数の個数: 40

約数和(自身を含む): 46497024

約数和(自身を除く): 24537008

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 71, 104, 142, 208, 284, 568, 923, 1136, 1487, 1846, 2974, 3692, 5948, 7384, 11896, 14768, 19331, 23792, 38662, 77324, 105577, 154648, 211154, 309296, 422308, 844616, 1372501, 1689232, 2745002, 5490004, 10980008, 21960016]

約数ペア:

[(1, 21960016), (2, 10980008), (4, 5490004), (8, 2745002), (13, 1689232), (16, 1372501), (26, 844616), (52, 422308), (71, 309296), (104, 211154), (142, 154648), (208, 105577), (284, 77324), (568, 38662), (923, 23792), (1136, 19331), (1487, 14768), (1846, 11896), (2974, 7384), (3692, 5948)]