12157820

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{67}}^1\times {\mathrm{211}}^1$

素因数の和:330

約数の個数: 48

約数和(自身を含む): 26640768

約数和(自身を除く): 14482948

約数列:

[1, 2, 4, 5, 10, 20, 43, 67, 86, 134, 172, 211, 215, 268, 335, 422, 430, 670, 844, 860, 1055, 1340, 2110, 2881, 4220, 5762, 9073, 11524, 14137, 14405, 18146, 28274, 28810, 36292, 45365, 56548, 57620, 70685, 90730, 141370, 181460, 282740, 607891, 1215782, 2431564, 3039455, 6078910, 12157820]

約数ペア:

[(1, 12157820), (2, 6078910), (4, 3039455), (5, 2431564), (10, 1215782), (20, 607891), (43, 282740), (67, 181460), (86, 141370), (134, 90730), (172, 70685), (211, 57620), (215, 56548), (268, 45365), (335, 36292), (422, 28810), (430, 28274), (670, 18146), (844, 14405), (860, 14137), (1055, 11524), (1340, 9073), (2110, 5762), (2881, 4220)]