1380320720

素因数分解:

$2^4\times 5^1\times {\mathrm{17254009}}^1$

素因数の和:17254022

約数の個数: 20

約数和(自身を含む): 3209245860

約数和(自身を除く): 1828925140

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 17254009, 34508018, 69016036, 86270045, 138032072, 172540090, 276064144, 345080180, 690160360, 1380320720]

約数ペア:

[(1, 1380320720), (2, 690160360), (4, 345080180), (5, 276064144), (8, 172540090), (10, 138032072), (16, 86270045), (20, 69016036), (40, 34508018), (80, 17254009)]