80787880

素因数分解:

$2^3\times 5^1\times {\mathrm{101}}^1\times {\mathrm{19997}}^1$

素因数の和:20109

約数の個数: 32

約数和(自身を含む): 183581640

約数和(自身を除く): 102793760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 101, 202, 404, 505, 808, 1010, 2020, 4040, 19997, 39994, 79988, 99985, 159976, 199970, 399940, 799880, 2019697, 4039394, 8078788, 10098485, 16157576, 20196970, 40393940, 80787880]

約数ペア:

[(1, 80787880), (2, 40393940), (4, 20196970), (5, 16157576), (8, 10098485), (10, 8078788), (20, 4039394), (40, 2019697), (101, 799880), (202, 399940), (404, 199970), (505, 159976), (808, 99985), (1010, 79988), (2020, 39994), (4040, 19997)]