80945945

素因数分解:

$5^1\times {\mathrm{89}}^1\times {\mathrm{101}}^1\times {\mathrm{1801}}^1$

素因数の和:1996

約数の個数: 16

約数和(自身を含む): 99254160

約数和(自身を除く): 18308215

約数列:

[1, 5, 89, 101, 445, 505, 1801, 8989, 9005, 44945, 160289, 181901, 801445, 909505, 16189189, 80945945]

約数ペア:

[(1, 80945945), (5, 16189189), (89, 909505), (101, 801445), (445, 181901), (505, 160289), (1801, 44945), (8989, 9005)]