19784840

素因数分解:

$2^3\times 5^1\times {\mathrm{494621}}^1$

素因数の和:494632

約数の個数: 16

約数和(自身を含む): 44515980

約数和(自身を除く): 24731140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 494621, 989242, 1978484, 2473105, 3956968, 4946210, 9892420, 19784840]

約数ペア:

[(1, 19784840), (2, 9892420), (4, 4946210), (5, 3956968), (8, 2473105), (10, 1978484), (20, 989242), (40, 494621)]