19647440

素因数分解:

$2^4\times 5^1\times {\mathrm{245593}}^1$

素因数の和:245606

約数の個数: 20

約数和(自身を含む): 45680484

約数和(自身を除く): 26033044

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 245593, 491186, 982372, 1227965, 1964744, 2455930, 3929488, 4911860, 9823720, 19647440]

約数ペア:

[(1, 19647440), (2, 9823720), (4, 4911860), (5, 3929488), (8, 2455930), (10, 1964744), (16, 1227965), (20, 982372), (40, 491186), (80, 245593)]