20280560

素因数分解:

$2^4\times 5^1\times {\mathrm{253507}}^1$

素因数の和:253520

約数の個数: 20

約数和(自身を含む): 47152488

約数和(自身を除く): 26871928

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 253507, 507014, 1014028, 1267535, 2028056, 2535070, 4056112, 5070140, 10140280, 20280560]

約数ペア:

[(1, 20280560), (2, 10140280), (4, 5070140), (5, 4056112), (8, 2535070), (10, 2028056), (16, 1267535), (20, 1014028), (40, 507014), (80, 253507)]