19884995

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{283}}^1$

素因数の和:371

約数の個数: 32

約数和(自身を含む): 27482112

約数和(自身を除く): 7597117

約数列:

[1, 5, 13, 23, 47, 65, 115, 235, 283, 299, 611, 1081, 1415, 1495, 3055, 3679, 5405, 6509, 13301, 14053, 18395, 32545, 66505, 70265, 84617, 172913, 305923, 423085, 864565, 1529615, 3976999, 19884995]

約数ペア:

[(1, 19884995), (5, 3976999), (13, 1529615), (23, 864565), (47, 423085), (65, 305923), (115, 172913), (235, 84617), (283, 70265), (299, 66505), (611, 32545), (1081, 18395), (1415, 14053), (1495, 13301), (3055, 6509), (3679, 5405)]