20990359

素因数分解:

${\mathrm{13}}^1\times {\mathrm{17}}^2\times {\mathrm{37}}^1\times {\mathrm{151}}^1$

素因数の和:235

約数の個数: 24

約数和(自身を含む): 24825248

約数和(自身を除く): 3834889

約数列:

[1, 13, 17, 37, 151, 221, 289, 481, 629, 1963, 2567, 3757, 5587, 8177, 10693, 33371, 43639, 72631, 94979, 139009, 567307, 1234727, 1614643, 20990359]

約数ペア:

[(1, 20990359), (13, 1614643), (17, 1234727), (37, 567307), (151, 139009), (221, 94979), (289, 72631), (481, 43639), (629, 33371), (1963, 10693), (2567, 8177), (3757, 5587)]