19957040

素因数分解:

$2^4\times 5^1\times {\mathrm{249463}}^1$

素因数の和:249476

約数の個数: 20

約数和(自身を含む): 46400304

約数和(自身を除く): 26443264

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 249463, 498926, 997852, 1247315, 1995704, 2494630, 3991408, 4989260, 9978520, 19957040]

約数ペア:

[(1, 19957040), (2, 9978520), (4, 4989260), (5, 3991408), (8, 2494630), (10, 1995704), (16, 1247315), (20, 997852), (40, 498926), (80, 249463)]