21690556

素因数分解:

$2^2\times {\mathrm{79}}^1\times {\mathrm{83}}^1\times {\mathrm{827}}^1$

素因数の和:993

約数の個数: 24

約数和(自身を含む): 38949120

約数和(自身を除く): 17258564

約数列:

[1, 2, 4, 79, 83, 158, 166, 316, 332, 827, 1654, 3308, 6557, 13114, 26228, 65333, 68641, 130666, 137282, 261332, 274564, 5422639, 10845278, 21690556]

約数ペア:

[(1, 21690556), (2, 10845278), (4, 5422639), (79, 274564), (83, 261332), (158, 137282), (166, 130666), (316, 68641), (332, 65333), (827, 26228), (1654, 13114), (3308, 6557)]