20622640

素因数分解:

$2^4\times 5^1\times {\mathrm{257783}}^1$

素因数の和:257796

約数の個数: 20

約数和(自身を含む): 47947824

約数和(自身を除く): 27325184

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 257783, 515566, 1031132, 1288915, 2062264, 2577830, 4124528, 5155660, 10311320, 20622640]

約数ペア:

[(1, 20622640), (2, 10311320), (4, 5155660), (5, 4124528), (8, 2577830), (10, 2062264), (16, 1288915), (20, 1031132), (40, 515566), (80, 257783)]