21349744

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{102643}}^1$

素因数の和:102664

約数の個数: 20

約数和(自身を含む): 44547496

約数和(自身を除く): 23197752

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 102643, 205286, 410572, 821144, 1334359, 1642288, 2668718, 5337436, 10674872, 21349744]

約数ペア:

[(1, 21349744), (2, 10674872), (4, 5337436), (8, 2668718), (13, 1642288), (16, 1334359), (26, 821144), (52, 410572), (104, 205286), (208, 102643)]