20989670

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{161459}}^1$

素因数の和:161479

約数の個数: 16

約数和(自身を含む): 40687920

約数和(自身を除く): 19698250

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 161459, 322918, 807295, 1614590, 2098967, 4197934, 10494835, 20989670]

約数ペア:

[(1, 20989670), (2, 10494835), (5, 4197934), (10, 2098967), (13, 1614590), (26, 807295), (65, 322918), (130, 161459)]