20781008

素因数分解:

$2^4\times {\mathrm{367}}^1\times {\mathrm{3539}}^1$

素因数の和:3914

約数の個数: 20

約数和(自身を含む): 40384320

約数和(自身を除く): 19603312

約数列:

[1, 2, 4, 8, 16, 367, 734, 1468, 2936, 3539, 5872, 7078, 14156, 28312, 56624, 1298813, 2597626, 5195252, 10390504, 20781008]

約数ペア:

[(1, 20781008), (2, 10390504), (4, 5195252), (8, 2597626), (16, 1298813), (367, 56624), (734, 28312), (1468, 14156), (2936, 7078), (3539, 5872)]