20531216

素因数分解:

$2^4\times {\mathrm{257}}^1\times {\mathrm{4993}}^1$

素因数の和:5258

約数の個数: 20

約数和(自身を含む): 39942012

約数和(自身を除く): 19410796

約数列:

[1, 2, 4, 8, 16, 257, 514, 1028, 2056, 4112, 4993, 9986, 19972, 39944, 79888, 1283201, 2566402, 5132804, 10265608, 20531216]

約数ペア:

[(1, 20531216), (2, 10265608), (4, 5132804), (8, 2566402), (16, 1283201), (257, 79888), (514, 39944), (1028, 19972), (2056, 9986), (4112, 4993)]