20540560

素因数分解:

$2^4\times 5^1\times {\mathrm{256757}}^1$

素因数の和:256770

約数の個数: 20

約数和(自身を含む): 47756988

約数和(自身を除く): 27216428

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 256757, 513514, 1027028, 1283785, 2054056, 2567570, 4108112, 5135140, 10270280, 20540560]

約数ペア:

[(1, 20540560), (2, 10270280), (4, 5135140), (5, 4108112), (8, 2567570), (10, 2054056), (16, 1283785), (20, 1027028), (40, 513514), (80, 256757)]