20125105

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{4021}}^1$

素因数の和:4057

約数の個数: 32

約数和(自身を含む): 32433408

約数和(自身を除く): 12308303

約数列:

[1, 5, 7, 11, 13, 35, 55, 65, 77, 91, 143, 385, 455, 715, 1001, 4021, 5005, 20105, 28147, 44231, 52273, 140735, 221155, 261365, 309617, 365911, 575003, 1548085, 1829555, 2875015, 4025021, 20125105]

約数ペア:

[(1, 20125105), (5, 4025021), (7, 2875015), (11, 1829555), (13, 1548085), (35, 575003), (55, 365911), (65, 309617), (77, 261365), (91, 221155), (143, 140735), (385, 52273), (455, 44231), (715, 28147), (1001, 20105), (4021, 5005)]