19808420

素因数分解:

$2^2\times 5^1\times {\mathrm{521}}^1\times {\mathrm{1901}}^1$

素因数の和:2431

約数の個数: 24

約数和(自身を含む): 41699448

約数和(自身を除く): 21891028

約数列:

[1, 2, 4, 5, 10, 20, 521, 1042, 1901, 2084, 2605, 3802, 5210, 7604, 9505, 10420, 19010, 38020, 990421, 1980842, 3961684, 4952105, 9904210, 19808420]

約数ペア:

[(1, 19808420), (2, 9904210), (4, 4952105), (5, 3961684), (10, 1980842), (20, 990421), (521, 38020), (1042, 19010), (1901, 10420), (2084, 9505), (2605, 7604), (3802, 5210)]