81776720

素因数分解:

$2^4\times 5^1\times {\mathrm{1022209}}^1$

素因数の和:1022222

約数の個数: 20

約数和(自身を含む): 190131060

約数和(自身を除く): 108354340

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1022209, 2044418, 4088836, 5111045, 8177672, 10222090, 16355344, 20444180, 40888360, 81776720]

約数ペア:

[(1, 81776720), (2, 40888360), (4, 20444180), (5, 16355344), (8, 10222090), (10, 8177672), (16, 5111045), (20, 4088836), (40, 2044418), (80, 1022209)]