81687020

素因数分解:

$2^2\times 5^1\times {\mathrm{1123}}^1\times {\mathrm{3637}}^1$

素因数の和:4769

約数の個数: 24

約数和(自身を含む): 171742704

約数和(自身を除く): 90055684

約数列:

[1, 2, 4, 5, 10, 20, 1123, 2246, 3637, 4492, 5615, 7274, 11230, 14548, 18185, 22460, 36370, 72740, 4084351, 8168702, 16337404, 20421755, 40843510, 81687020]

約数ペア:

[(1, 81687020), (2, 40843510), (4, 20421755), (5, 16337404), (10, 8168702), (20, 4084351), (1123, 72740), (2246, 36370), (3637, 22460), (4492, 18185), (5615, 14548), (7274, 11230)]