21057010

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{161977}}^1$

素因数の和:161997

約数の個数: 16

約数和(自身を含む): 40818456

約数和(自身を除く): 19761446

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 161977, 323954, 809885, 1619770, 2105701, 4211402, 10528505, 21057010]

約数ペア:

[(1, 21057010), (2, 10528505), (5, 4211402), (10, 2105701), (13, 1619770), (26, 809885), (65, 323954), (130, 161977)]