21781806

素因数分解:

$2^1\times 3^1\times {\mathrm{71}}^1\times {\mathrm{51131}}^1$

素因数の和:51207

約数の個数: 16

約数和(自身を含む): 44178048

約数和(自身を除く): 22396242

約数列:

[1, 2, 3, 6, 71, 142, 213, 426, 51131, 102262, 153393, 306786, 3630301, 7260602, 10890903, 21781806]

約数ペア:

[(1, 21781806), (2, 10890903), (3, 7260602), (6, 3630301), (71, 306786), (142, 153393), (213, 102262), (426, 51131)]