21000604820

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{80771557}}^1$

素因数の和:80771579

約数の個数: 24

約数和(自身を含む): 47493676104

約数和(自身を除く): 26493071284

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 80771557, 161543114, 323086228, 403857785, 807715570, 1050030241, 1615431140, 2100060482, 4200120964, 5250151205, 10500302410, 21000604820]

約数ペア:

[(1, 21000604820), (2, 10500302410), (4, 5250151205), (5, 4200120964), (10, 2100060482), (13, 1615431140), (20, 1050030241), (26, 807715570), (52, 403857785), (65, 323086228), (130, 161543114), (260, 80771557)]