128354840

素因数分解:

$2^3\times 5^1\times {\mathrm{101}}^1\times {\mathrm{31771}}^1$

素因数の和:31883

約数の個数: 32

約数和(自身を含む): 291666960

約数和(自身を除く): 163312120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 101, 202, 404, 505, 808, 1010, 2020, 4040, 31771, 63542, 127084, 158855, 254168, 317710, 635420, 1270840, 3208871, 6417742, 12835484, 16044355, 25670968, 32088710, 64177420, 128354840]

約数ペア:

[(1, 128354840), (2, 64177420), (4, 32088710), (5, 25670968), (8, 16044355), (10, 12835484), (20, 6417742), (40, 3208871), (101, 1270840), (202, 635420), (404, 317710), (505, 254168), (808, 158855), (1010, 127084), (2020, 63542), (4040, 31771)]