28642257

素因数分解:

$3^2\times 7^1\times {\mathrm{43}}^1\times {\mathrm{97}}^1\times {\mathrm{109}}^1$

素因数の和:262

約数の個数: 48

約数和(自身を含む): 49329280

約数和(自身を除く): 20687023

約数列:

[1, 3, 7, 9, 21, 43, 63, 97, 109, 129, 291, 301, 327, 387, 679, 763, 873, 903, 981, 2037, 2289, 2709, 4171, 4687, 6111, 6867, 10573, 12513, 14061, 29197, 31719, 32809, 37539, 42183, 74011, 87591, 95157, 98427, 222033, 262773, 295281, 454639, 666099, 1363917, 3182473, 4091751, 9547419, 28642257]

約数ペア:

[(1, 28642257), (3, 9547419), (7, 4091751), (9, 3182473), (21, 1363917), (43, 666099), (63, 454639), (97, 295281), (109, 262773), (129, 222033), (291, 98427), (301, 95157), (327, 87591), (387, 74011), (679, 42183), (763, 37539), (873, 32809), (903, 31719), (981, 29197), (2037, 14061), (2289, 12513), (2709, 10573), (4171, 6867), (4687, 6111)]