256080920

素因数分解:

$2^3\times 5^1\times {\mathrm{281}}^1\times {\mathrm{22783}}^1$

素因数の和:23075

約数の個数: 32

約数和(自身を含む): 578257920

約数和(自身を除く): 322177000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 281, 562, 1124, 1405, 2248, 2810, 5620, 11240, 22783, 45566, 91132, 113915, 182264, 227830, 455660, 911320, 6402023, 12804046, 25608092, 32010115, 51216184, 64020230, 128040460, 256080920]

約数ペア:

[(1, 256080920), (2, 128040460), (4, 64020230), (5, 51216184), (8, 32010115), (10, 25608092), (20, 12804046), (40, 6402023), (281, 911320), (562, 455660), (1124, 227830), (1405, 182264), (2248, 113915), (2810, 91132), (5620, 45566), (11240, 22783)]