81412780

素因数分解:

$2^2\times 5^1\times {\mathrm{179}}^1\times {\mathrm{22741}}^1$

素因数の和:22929

約数の個数: 24

約数和(自身を含む): 171929520

約数和(自身を除く): 90516740

約数列:

[1, 2, 4, 5, 10, 20, 179, 358, 716, 895, 1790, 3580, 22741, 45482, 90964, 113705, 227410, 454820, 4070639, 8141278, 16282556, 20353195, 40706390, 81412780]

約数ペア:

[(1, 81412780), (2, 40706390), (4, 20353195), (5, 16282556), (10, 8141278), (20, 4070639), (179, 454820), (358, 227410), (716, 113705), (895, 90964), (1790, 45482), (3580, 22741)]