20439560

素因数分解:

$2^3\times 5^1\times {\mathrm{510989}}^1$

素因数の和:511000

約数の個数: 16

約数和(自身を含む): 45989100

約数和(自身を除く): 25549540

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 510989, 1021978, 2043956, 2554945, 4087912, 5109890, 10219780, 20439560]

約数ペア:

[(1, 20439560), (2, 10219780), (4, 5109890), (5, 4087912), (8, 2554945), (10, 2043956), (20, 1021978), (40, 510989)]