78900020

素因数分解:

$2^2\times 5^1\times {\mathrm{127}}^1\times {\mathrm{31063}}^1$

素因数の和:31199

約数の個数: 24

約数和(自身を含む): 167000064

約数和(自身を除く): 88100044

約数列:

[1, 2, 4, 5, 10, 20, 127, 254, 508, 635, 1270, 2540, 31063, 62126, 124252, 155315, 310630, 621260, 3945001, 7890002, 15780004, 19725005, 39450010, 78900020]

約数ペア:

[(1, 78900020), (2, 39450010), (4, 19725005), (5, 15780004), (10, 7890002), (20, 3945001), (127, 621260), (254, 310630), (508, 155315), (635, 124252), (1270, 62126), (2540, 31063)]