66158420

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{80681}}^1$

素因数の和:80731

約数の個数: 24

約数和(自身を含む): 142323048

約数和(自身を除く): 76164628

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 80681, 161362, 322724, 403405, 806810, 1613620, 3307921, 6615842, 13231684, 16539605, 33079210, 66158420]

約数ペア:

[(1, 66158420), (2, 33079210), (4, 16539605), (5, 13231684), (10, 6615842), (20, 3307921), (41, 1613620), (82, 806810), (164, 403405), (205, 322724), (410, 161362), (820, 80681)]