20896840

素因数分解:

$2^3\times 5^1\times {\mathrm{53}}^1\times {\mathrm{9857}}^1$

素因数の和:9921

約数の個数: 32

約数和(自身を含む): 47909880

約数和(自身を除く): 27013040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 53, 106, 212, 265, 424, 530, 1060, 2120, 9857, 19714, 39428, 49285, 78856, 98570, 197140, 394280, 522421, 1044842, 2089684, 2612105, 4179368, 5224210, 10448420, 20896840]

約数ペア:

[(1, 20896840), (2, 10448420), (4, 5224210), (5, 4179368), (8, 2612105), (10, 2089684), (20, 1044842), (40, 522421), (53, 394280), (106, 197140), (212, 98570), (265, 78856), (424, 49285), (530, 39428), (1060, 19714), (2120, 9857)]