20537680

素因数分解:

$2^4\times 5^1\times {\mathrm{256721}}^1$

素因数の和:256734

約数の個数: 20

約数和(自身を含む): 47750292

約数和(自身を除く): 27212612

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 256721, 513442, 1026884, 1283605, 2053768, 2567210, 4107536, 5134420, 10268840, 20537680]

約数ペア:

[(1, 20537680), (2, 10268840), (4, 5134420), (5, 4107536), (8, 2567210), (10, 2053768), (16, 1283605), (20, 1026884), (40, 513442), (80, 256721)]