81378380

素因数分解:

$2^2\times 5^1\times {\mathrm{569}}^1\times {\mathrm{7151}}^1$

素因数の和:7729

約数の個数: 24

約数和(自身を含む): 171218880

約数和(自身を除く): 89840500

約数列:

[1, 2, 4, 5, 10, 20, 569, 1138, 2276, 2845, 5690, 7151, 11380, 14302, 28604, 35755, 71510, 143020, 4068919, 8137838, 16275676, 20344595, 40689190, 81378380]

約数ペア:

[(1, 81378380), (2, 40689190), (4, 20344595), (5, 16275676), (10, 8137838), (20, 4068919), (569, 143020), (1138, 71510), (2276, 35755), (2845, 28604), (5690, 14302), (7151, 11380)]