40989980

素因数分解:

$2^2\times 5^1\times {\mathrm{409}}^1\times {\mathrm{5011}}^1$

素因数の和:5429

約数の個数: 24

約数和(自身を含む): 86306640

約数和(自身を除く): 45316660

約数列:

[1, 2, 4, 5, 10, 20, 409, 818, 1636, 2045, 4090, 5011, 8180, 10022, 20044, 25055, 50110, 100220, 2049499, 4098998, 8197996, 10247495, 20494990, 40989980]

約数ペア:

[(1, 40989980), (2, 20494990), (4, 10247495), (5, 8197996), (10, 4098998), (20, 2049499), (409, 100220), (818, 50110), (1636, 25055), (2045, 20044), (4090, 10022), (5011, 8180)]