19647280

素因数分解:

$2^4\times 5^1\times {\mathrm{245591}}^1$

素因数の和:245604

約数の個数: 20

約数和(自身を含む): 45680112

約数和(自身を除く): 26032832

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 245591, 491182, 982364, 1227955, 1964728, 2455910, 3929456, 4911820, 9823640, 19647280]

約数ペア:

[(1, 19647280), (2, 9823640), (4, 4911820), (5, 3929456), (8, 2455910), (10, 1964728), (16, 1227955), (20, 982364), (40, 491182), (80, 245591)]