1007980

素因数分解:

$2^2\times 5^1\times {\mathrm{101}}^1\times {\mathrm{499}}^1$

素因数の和:609

約数の個数: 24

約数和(自身を含む): 2142000

約数和(自身を除く): 1134020

約数列:

[1, 2, 4, 5, 10, 20, 101, 202, 404, 499, 505, 998, 1010, 1996, 2020, 2495, 4990, 9980, 50399, 100798, 201596, 251995, 503990, 1007980]

約数ペア:

[(1, 1007980), (2, 503990), (4, 251995), (5, 201596), (10, 100798), (20, 50399), (101, 9980), (202, 4990), (404, 2495), (499, 2020), (505, 1996), (998, 1010)]