81247580

素因数分解:

$2^2\times 5^1\times {\mathrm{191}}^1\times {\mathrm{21269}}^1$

素因数の和:21469

約数の個数: 24

約数和(自身を含む): 171521280

約数和(自身を除く): 90273700

約数列:

[1, 2, 4, 5, 10, 20, 191, 382, 764, 955, 1910, 3820, 21269, 42538, 85076, 106345, 212690, 425380, 4062379, 8124758, 16249516, 20311895, 40623790, 81247580]

約数ペア:

[(1, 81247580), (2, 40623790), (4, 20311895), (5, 16249516), (10, 8124758), (20, 4062379), (191, 425380), (382, 212690), (764, 106345), (955, 85076), (1910, 42538), (3820, 21269)]