81671780

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{51691}}^1$

素因数の和:51779

約数の個数: 24

約数和(自身を含む): 173685120

約数和(自身を除く): 92013340

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 316, 395, 790, 1580, 51691, 103382, 206764, 258455, 516910, 1033820, 4083589, 8167178, 16334356, 20417945, 40835890, 81671780]

約数ペア:

[(1, 81671780), (2, 40835890), (4, 20417945), (5, 16334356), (10, 8167178), (20, 4083589), (79, 1033820), (158, 516910), (316, 258455), (395, 206764), (790, 103382), (1580, 51691)]