19402640

素因数分解:

$2^4\times 5^1\times {\mathrm{242533}}^1$

素因数の和:242546

約数の個数: 20

約数和(自身を含む): 45111324

約数和(自身を除く): 25708684

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 242533, 485066, 970132, 1212665, 1940264, 2425330, 3880528, 4850660, 9701320, 19402640]

約数ペア:

[(1, 19402640), (2, 9701320), (4, 4850660), (5, 3880528), (8, 2425330), (10, 1940264), (16, 1212665), (20, 970132), (40, 485066), (80, 242533)]