81507620

素因数分解:

$2^2\times 5^1\times {\mathrm{601}}^1\times {\mathrm{6781}}^1$

素因数の和:7391

約数の個数: 24

約数和(自身を含む): 171476088

約数和(自身を除く): 89968468

約数列:

[1, 2, 4, 5, 10, 20, 601, 1202, 2404, 3005, 6010, 6781, 12020, 13562, 27124, 33905, 67810, 135620, 4075381, 8150762, 16301524, 20376905, 40753810, 81507620]

約数ペア:

[(1, 81507620), (2, 40753810), (4, 20376905), (5, 16301524), (10, 8150762), (20, 4075381), (601, 135620), (1202, 67810), (2404, 33905), (3005, 27124), (6010, 13562), (6781, 12020)]