79989880

素因数分解:

$2^3\times 5^1\times {\mathrm{197}}^1\times {\mathrm{10151}}^1$

素因数の和:10359

約数の個数: 32

約数和(自身を含む): 180908640

約数和(自身を除く): 100918760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 197, 394, 788, 985, 1576, 1970, 3940, 7880, 10151, 20302, 40604, 50755, 81208, 101510, 203020, 406040, 1999747, 3999494, 7998988, 9998735, 15997976, 19997470, 39994940, 79989880]

約数ペア:

[(1, 79989880), (2, 39994940), (4, 19997470), (5, 15997976), (8, 9998735), (10, 7998988), (20, 3999494), (40, 1999747), (197, 406040), (394, 203020), (788, 101510), (985, 81208), (1576, 50755), (1970, 40604), (3940, 20302), (7880, 10151)]