256988440

素因数分解:

$2^3\times 5^1\times {\mathrm{101}}^1\times {\mathrm{63611}}^1$

素因数の和:63723

約数の個数: 32

約数和(自身を含む): 583958160

約数和(自身を除く): 326969720

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 101, 202, 404, 505, 808, 1010, 2020, 4040, 63611, 127222, 254444, 318055, 508888, 636110, 1272220, 2544440, 6424711, 12849422, 25698844, 32123555, 51397688, 64247110, 128494220, 256988440]

約数ペア:

[(1, 256988440), (2, 128494220), (4, 64247110), (5, 51397688), (8, 32123555), (10, 25698844), (20, 12849422), (40, 6424711), (101, 2544440), (202, 1272220), (404, 636110), (505, 508888), (808, 318055), (1010, 254444), (2020, 127222), (4040, 63611)]