20416720

素因数分解:

$2^4\times 5^1\times {\mathrm{255209}}^1$

素因数の和:255222

約数の個数: 20

約数和(自身を含む): 47469060

約数和(自身を除く): 27052340

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 255209, 510418, 1020836, 1276045, 2041672, 2552090, 4083344, 5104180, 10208360, 20416720]

約数ペア:

[(1, 20416720), (2, 10208360), (4, 5104180), (5, 4083344), (8, 2552090), (10, 2041672), (16, 1276045), (20, 1020836), (40, 510418), (80, 255209)]