20698640

素因数分解:

$2^4\times 5^1\times {\mathrm{258733}}^1$

素因数の和:258746

約数の個数: 20

約数和(自身を含む): 48124524

約数和(自身を除く): 27425884

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 258733, 517466, 1034932, 1293665, 2069864, 2587330, 4139728, 5174660, 10349320, 20698640]

約数ペア:

[(1, 20698640), (2, 10349320), (4, 5174660), (5, 4139728), (8, 2587330), (10, 2069864), (16, 1293665), (20, 1034932), (40, 517466), (80, 258733)]