19808840

素因数分解:

$2^3\times 5^1\times {\mathrm{495221}}^1$

素因数の和:495232

約数の個数: 16

約数和(自身を含む): 44569980

約数和(自身を除く): 24761140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 495221, 990442, 1980884, 2476105, 3961768, 4952210, 9904420, 19808840]

約数ペア:

[(1, 19808840), (2, 9904420), (4, 4952210), (5, 3961768), (8, 2476105), (10, 1980884), (20, 990442), (40, 495221)]