21000427917

素因数分解:

$3^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{18868309}}^1$

素因数の和:18868372

約数の個数: 16

約数和(自身を含む): 32604439680

約数和(自身を除く): 11604011763

約数列:

[1, 3, 7, 21, 53, 159, 371, 1113, 18868309, 56604927, 132078163, 396234489, 1000020377, 3000061131, 7000142639, 21000427917]

約数ペア:

[(1, 21000427917), (3, 7000142639), (7, 3000061131), (21, 1000020377), (53, 396234489), (159, 132078163), (371, 56604927), (1113, 18868309)]