81765680

素因数分解:

$2^4\times 5^1\times {\mathrm{1022071}}^1$

素因数の和:1022084

約数の個数: 20

約数和(自身を含む): 190105392

約数和(自身を除く): 108339712

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1022071, 2044142, 4088284, 5110355, 8176568, 10220710, 16353136, 20441420, 40882840, 81765680]

約数ペア:

[(1, 81765680), (2, 40882840), (4, 20441420), (5, 16353136), (8, 10220710), (10, 8176568), (16, 5110355), (20, 4088284), (40, 2044142), (80, 1022071)]