21807849

素因数分解:

$3^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{139}}^1\times {\mathrm{241}}^1$

素因数の和:421

約数の個数: 32

約数和(自身を含む): 34693120

約数和(自身を除く): 12885271

約数列:

[1, 3, 7, 21, 31, 93, 139, 217, 241, 417, 651, 723, 973, 1687, 2919, 4309, 5061, 7471, 12927, 22413, 30163, 33499, 52297, 90489, 100497, 156891, 234493, 703479, 1038469, 3115407, 7269283, 21807849]

約数ペア:

[(1, 21807849), (3, 7269283), (7, 3115407), (21, 1038469), (31, 703479), (93, 234493), (139, 156891), (217, 100497), (241, 90489), (417, 52297), (651, 33499), (723, 30163), (973, 22413), (1687, 12927), (2919, 7471), (4309, 5061)]