19797040

素因数分解:

$2^4\times 5^1\times {\mathrm{247463}}^1$

素因数の和:247476

約数の個数: 20

約数和(自身を含む): 46028304

約数和(自身を除く): 26231264

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 247463, 494926, 989852, 1237315, 1979704, 2474630, 3959408, 4949260, 9898520, 19797040]

約数ペア:

[(1, 19797040), (2, 9898520), (4, 4949260), (5, 3959408), (8, 2474630), (10, 1979704), (16, 1237315), (20, 989852), (40, 494926), (80, 247463)]