20878495

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{139}}^1\times {\mathrm{2731}}^1$

素因数の和:2886

約数の個数: 16

約数和(自身を含む): 27538560

約数和(自身を除く): 6660065

約数列:

[1, 5, 11, 55, 139, 695, 1529, 2731, 7645, 13655, 30041, 150205, 379609, 1898045, 4175699, 20878495]

約数ペア:

[(1, 20878495), (5, 4175699), (11, 1898045), (55, 379609), (139, 150205), (695, 30041), (1529, 13655), (2731, 7645)]