19982780

素因数分解:

$2^2\times 5^1\times {\mathrm{277}}^1\times {\mathrm{3607}}^1$

素因数の和:3893

約数の個数: 24

約数和(自身を含む): 42127008

約数和(自身を除く): 22144228

約数列:

[1, 2, 4, 5, 10, 20, 277, 554, 1108, 1385, 2770, 3607, 5540, 7214, 14428, 18035, 36070, 72140, 999139, 1998278, 3996556, 4995695, 9991390, 19982780]

約数ペア:

[(1, 19982780), (2, 9991390), (4, 4995695), (5, 3996556), (10, 1998278), (20, 999139), (277, 72140), (554, 36070), (1108, 18035), (1385, 14428), (2770, 7214), (3607, 5540)]