19388680

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{6827}}^1$

素因数の和:6909

約数の個数: 32

約数和(自身を含む): 44245440

約数和(自身を除く): 24856760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 142, 284, 355, 568, 710, 1420, 2840, 6827, 13654, 27308, 34135, 54616, 68270, 136540, 273080, 484717, 969434, 1938868, 2423585, 3877736, 4847170, 9694340, 19388680]

約数ペア:

[(1, 19388680), (2, 9694340), (4, 4847170), (5, 3877736), (8, 2423585), (10, 1938868), (20, 969434), (40, 484717), (71, 273080), (142, 136540), (284, 68270), (355, 54616), (568, 34135), (710, 27308), (1420, 13654), (2840, 6827)]