20218420

素因数分解:

$2^2\times 5^1\times {\mathrm{401}}^1\times {\mathrm{2521}}^1$

素因数の和:2931

約数の個数: 24

約数和(自身を含む): 42581448

約数和(自身を除く): 22363028

約数列:

[1, 2, 4, 5, 10, 20, 401, 802, 1604, 2005, 2521, 4010, 5042, 8020, 10084, 12605, 25210, 50420, 1010921, 2021842, 4043684, 5054605, 10109210, 20218420]

約数ペア:

[(1, 20218420), (2, 10109210), (4, 5054605), (5, 4043684), (10, 2021842), (20, 1010921), (401, 50420), (802, 25210), (1604, 12605), (2005, 10084), (2521, 8020), (4010, 5042)]