81028880

素因数分解:

$2^4\times 5^1\times {\mathrm{1012861}}^1$

素因数の和:1012874

約数の個数: 20

約数和(自身を含む): 188392332

約数和(自身を除く): 107363452

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1012861, 2025722, 4051444, 5064305, 8102888, 10128610, 16205776, 20257220, 40514440, 81028880]

約数ペア:

[(1, 81028880), (2, 40514440), (4, 20257220), (5, 16205776), (8, 10128610), (10, 8102888), (16, 5064305), (20, 4051444), (40, 2025722), (80, 1012861)]