28381520

素因数分解:

$2^4\times 5^1\times {\mathrm{149}}^1\times {\mathrm{2381}}^1$

素因数の和:2543

約数の個数: 40

約数和(自身を含む): 66457800

約数和(自身を除く): 38076280

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 149, 298, 596, 745, 1192, 1490, 2381, 2384, 2980, 4762, 5960, 9524, 11905, 11920, 19048, 23810, 38096, 47620, 95240, 190480, 354769, 709538, 1419076, 1773845, 2838152, 3547690, 5676304, 7095380, 14190760, 28381520]

約数ペア:

[(1, 28381520), (2, 14190760), (4, 7095380), (5, 5676304), (8, 3547690), (10, 2838152), (16, 1773845), (20, 1419076), (40, 709538), (80, 354769), (149, 190480), (298, 95240), (596, 47620), (745, 38096), (1192, 23810), (1490, 19048), (2381, 11920), (2384, 11905), (2980, 9524), (4762, 5960)]