128444080

素因数分解:

$2^4\times 5^1\times {\mathrm{1605551}}^1$

素因数の和:1605564

約数の個数: 20

約数和(自身を含む): 298632672

約数和(自身を除く): 170188592

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1605551, 3211102, 6422204, 8027755, 12844408, 16055510, 25688816, 32111020, 64222040, 128444080]

約数ペア:

[(1, 128444080), (2, 64222040), (4, 32111020), (5, 25688816), (8, 16055510), (10, 12844408), (16, 8027755), (20, 6422204), (40, 3211102), (80, 1605551)]