81380840

素因数分解:

$2^3\times 5^1\times {\mathrm{2034521}}^1$

素因数の和:2034532

約数の個数: 16

約数和(自身を含む): 183106980

約数和(自身を除く): 101726140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 2034521, 4069042, 8138084, 10172605, 16276168, 20345210, 40690420, 81380840]

約数ペア:

[(1, 81380840), (2, 40690420), (4, 20345210), (5, 16276168), (8, 10172605), (10, 8138084), (20, 4069042), (40, 2034521)]