20398861

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{257}}^1$

素因数の和:333

約数の個数: 32

約数和(自身を含む): 26749440

約数和(自身を除く): 6350579

約数列:

[1, 7, 17, 23, 29, 119, 161, 203, 257, 391, 493, 667, 1799, 2737, 3451, 4369, 4669, 5911, 7453, 11339, 30583, 41377, 52171, 79373, 100487, 126701, 171419, 703409, 886907, 1199933, 2914123, 20398861]

約数ペア:

[(1, 20398861), (7, 2914123), (17, 1199933), (23, 886907), (29, 703409), (119, 171419), (161, 126701), (203, 100487), (257, 79373), (391, 52171), (493, 41377), (667, 30583), (1799, 11339), (2737, 7453), (3451, 5911), (4369, 4669)]