86891980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{620657}}^1$

素因数の和:620673

約数の個数: 24

約数和(自身を含む): 208541088

約数和(自身を除く): 121649108

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 620657, 1241314, 2482628, 3103285, 4344599, 6206570, 8689198, 12413140, 17378396, 21722995, 43445990, 86891980]

約数ペア:

[(1, 86891980), (2, 43445990), (4, 21722995), (5, 17378396), (7, 12413140), (10, 8689198), (14, 6206570), (20, 4344599), (28, 3103285), (35, 2482628), (70, 1241314), (140, 620657)]