81647620

素因数分解:

$2^2\times 5^1\times {\mathrm{457}}^1\times {\mathrm{8933}}^1$

素因数の和:9399

約数の個数: 24

約数和(自身を含む): 171854424

約数和(自身を除く): 90206804

約数列:

[1, 2, 4, 5, 10, 20, 457, 914, 1828, 2285, 4570, 8933, 9140, 17866, 35732, 44665, 89330, 178660, 4082381, 8164762, 16329524, 20411905, 40823810, 81647620]

約数ペア:

[(1, 81647620), (2, 40823810), (4, 20411905), (5, 16329524), (10, 8164762), (20, 4082381), (457, 178660), (914, 89330), (1828, 44665), (2285, 35732), (4570, 17866), (8933, 9140)]