21781444610

素因数分解:

$2^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{30678091}}^1$

素因数の和:30678169

約数の個数: 16

約数和(自身を含む): 39758807232

約数和(自身を除く): 17977362622

約数列:

[1, 2, 5, 10, 71, 142, 355, 710, 30678091, 61356182, 153390455, 306780910, 2178144461, 4356288922, 10890722305, 21781444610]

約数ペア:

[(1, 21781444610), (2, 10890722305), (5, 4356288922), (10, 2178144461), (71, 306780910), (142, 153390455), (355, 61356182), (710, 30678091)]