20781842

素因数分解:

$2^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{4721}}^1$

素因数の和:4825

約数の個数: 16

約数和(自身を含む): 32638464

約数和(自身を除く): 11856622

約数列:

[1, 2, 31, 62, 71, 142, 2201, 4402, 4721, 9442, 146351, 292702, 335191, 670382, 10390921, 20781842]

約数ペア:

[(1, 20781842), (2, 10390921), (31, 670382), (62, 335191), (71, 292702), (142, 146351), (2201, 9442), (4402, 4721)]