81104780

素因数分解:

$2^2\times 5^1\times {\mathrm{1259}}^1\times {\mathrm{3221}}^1$

素因数の和:4489

約数の個数: 24

約数和(自身を含む): 170508240

約数和(自身を除く): 89403460

約数列:

[1, 2, 4, 5, 10, 20, 1259, 2518, 3221, 5036, 6295, 6442, 12590, 12884, 16105, 25180, 32210, 64420, 4055239, 8110478, 16220956, 20276195, 40552390, 81104780]

約数ペア:

[(1, 81104780), (2, 40552390), (4, 20276195), (5, 16220956), (10, 8110478), (20, 4055239), (1259, 64420), (2518, 32210), (3221, 25180), (5036, 16105), (6295, 12884), (6442, 12590)]