81427340

素因数分解:

$2^2\times 5^1\times {\mathrm{1223}}^1\times {\mathrm{3329}}^1$

素因数の和:4561

約数の個数: 24

約数和(自身を含む): 171188640

約数和(自身を除く): 89761300

約数列:

[1, 2, 4, 5, 10, 20, 1223, 2446, 3329, 4892, 6115, 6658, 12230, 13316, 16645, 24460, 33290, 66580, 4071367, 8142734, 16285468, 20356835, 40713670, 81427340]

約数ペア:

[(1, 81427340), (2, 40713670), (4, 20356835), (5, 16285468), (10, 8142734), (20, 4071367), (1223, 66580), (2446, 33290), (3329, 24460), (4892, 16645), (6115, 13316), (6658, 12230)]