19984280

素因数分解:

$2^3\times 5^1\times {\mathrm{499607}}^1$

素因数の和:499618

約数の個数: 16

約数和(自身を含む): 44964720

約数和(自身を除く): 24980440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 499607, 999214, 1998428, 2498035, 3996856, 4996070, 9992140, 19984280]

約数ペア:

[(1, 19984280), (2, 9992140), (4, 4996070), (5, 3996856), (8, 2498035), (10, 1998428), (20, 999214), (40, 499607)]