20400280

素因数分解:

$2^3\times 5^1\times {\mathrm{510007}}^1$

素因数の和:510018

約数の個数: 16

約数和(自身を含む): 45900720

約数和(自身を除く): 25500440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 510007, 1020014, 2040028, 2550035, 4080056, 5100070, 10200140, 20400280]

約数ペア:

[(1, 20400280), (2, 10200140), (4, 5100070), (5, 4080056), (8, 2550035), (10, 2040028), (20, 1020014), (40, 510007)]