129776720

素因数分解:

$2^4\times 5^1\times {\mathrm{1622209}}^1$

素因数の和:1622222

約数の個数: 20

約数和(自身を含む): 301731060

約数和(自身を除く): 171954340

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1622209, 3244418, 6488836, 8111045, 12977672, 16222090, 25955344, 32444180, 64888360, 129776720]

約数ペア:

[(1, 129776720), (2, 64888360), (4, 32444180), (5, 25955344), (8, 16222090), (10, 12977672), (16, 8111045), (20, 6488836), (40, 3244418), (80, 1622209)]