256720

素因数分解:

$2^4\times 5^1\times {\mathrm{3209}}^1$

素因数の和:3222

約数の個数: 20

約数和(自身を含む): 597060

約数和(自身を除く): 340340

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 3209, 6418, 12836, 16045, 25672, 32090, 51344, 64180, 128360, 256720]

約数ペア:

[(1, 256720), (2, 128360), (4, 64180), (5, 51344), (8, 32090), (10, 25672), (16, 16045), (20, 12836), (40, 6418), (80, 3209)]