21202820

素因数分解:

$2^2\times 5^1\times {\mathrm{67}}^1\times {\mathrm{15823}}^1$

素因数の和:15899

約数の個数: 24

約数和(自身を含む): 45193344

約数和(自身を除く): 23990524

約数列:

[1, 2, 4, 5, 10, 20, 67, 134, 268, 335, 670, 1340, 15823, 31646, 63292, 79115, 158230, 316460, 1060141, 2120282, 4240564, 5300705, 10601410, 21202820]

約数ペア:

[(1, 21202820), (2, 10601410), (4, 5300705), (5, 4240564), (10, 2120282), (20, 1060141), (67, 316460), (134, 158230), (268, 79115), (335, 63292), (670, 31646), (1340, 15823)]