20400891

素因数分解:

$3^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{139}}^1\times {\mathrm{241}}^1$

素因数の和:419

約数の個数: 32

約数和(自身を含む): 32524800

約数和(自身を除く): 12123909

約数列:

[1, 3, 7, 21, 29, 87, 139, 203, 241, 417, 609, 723, 973, 1687, 2919, 4031, 5061, 6989, 12093, 20967, 28217, 33499, 48923, 84651, 100497, 146769, 234493, 703479, 971471, 2914413, 6800297, 20400891]

約数ペア:

[(1, 20400891), (3, 6800297), (7, 2914413), (21, 971471), (29, 703479), (87, 234493), (139, 146769), (203, 100497), (241, 84651), (417, 48923), (609, 33499), (723, 28217), (973, 20967), (1687, 12093), (2919, 6989), (4031, 5061)]