21984176090

素因数分解:

$2^1\times 5^1\times {\mathrm{79}}^1\times {\mathrm{27828071}}^1$

素因数の和:27828157

約数の個数: 16

約数和(自身を含む): 40072423680

約数和(自身を除く): 18088247590

約数列:

[1, 2, 5, 10, 79, 158, 395, 790, 27828071, 55656142, 139140355, 278280710, 2198417609, 4396835218, 10992088045, 21984176090]

約数ペア:

[(1, 21984176090), (2, 10992088045), (5, 4396835218), (10, 2198417609), (79, 278280710), (158, 139140355), (395, 55656142), (790, 27828071)]