128480720

素因数分解:

$2^4\times 5^1\times {\mathrm{1606009}}^1$

素因数の和:1606022

約数の個数: 20

約数和(自身を含む): 298717860

約数和(自身を除く): 170237140

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1606009, 3212018, 6424036, 8030045, 12848072, 16060090, 25696144, 32120180, 64240360, 128480720]

約数ペア:

[(1, 128480720), (2, 64240360), (4, 32120180), (5, 25696144), (8, 16060090), (10, 12848072), (16, 8030045), (20, 6424036), (40, 3212018), (80, 1606009)]