19496720

素因数分解:

$2^4\times 5^1\times {\mathrm{243709}}^1$

素因数の和:243722

約数の個数: 20

約数和(自身を含む): 45330060

約数和(自身を除く): 25833340

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 243709, 487418, 974836, 1218545, 1949672, 2437090, 3899344, 4874180, 9748360, 19496720]

約数ペア:

[(1, 19496720), (2, 9748360), (4, 4874180), (5, 3899344), (8, 2437090), (10, 1949672), (16, 1218545), (20, 974836), (40, 487418), (80, 243709)]