20829580

素因数分解:

$2^2\times 5^1\times {\mathrm{521}}^1\times {\mathrm{1999}}^1$

素因数の和:2529

約数の個数: 24

約数和(自身を含む): 43848000

約数和(自身を除く): 23018420

約数列:

[1, 2, 4, 5, 10, 20, 521, 1042, 1999, 2084, 2605, 3998, 5210, 7996, 9995, 10420, 19990, 39980, 1041479, 2082958, 4165916, 5207395, 10414790, 20829580]

約数ペア:

[(1, 20829580), (2, 10414790), (4, 5207395), (5, 4165916), (10, 2082958), (20, 1041479), (521, 39980), (1042, 19990), (1999, 10420), (2084, 9995), (2605, 7996), (3998, 5210)]