19118420

素因数分解:

$2^2\times 5^1\times {\mathrm{449}}^1\times {\mathrm{2129}}^1$

素因数の和:2587

約数の個数: 24

約数和(自身を含む): 40257000

約数和(自身を除く): 21138580

約数列:

[1, 2, 4, 5, 10, 20, 449, 898, 1796, 2129, 2245, 4258, 4490, 8516, 8980, 10645, 21290, 42580, 955921, 1911842, 3823684, 4779605, 9559210, 19118420]

約数ペア:

[(1, 19118420), (2, 9559210), (4, 4779605), (5, 3823684), (10, 1911842), (20, 955921), (449, 42580), (898, 21290), (1796, 10645), (2129, 8980), (2245, 8516), (4258, 4490)]