31351257

素因数分解:

$3^2\times 7^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1\times {\mathrm{163}}^1$

素因数の和:290

約数の個数: 48

約数和(自身を含む): 54033408

約数和(自身を除く): 22682151

約数列:

[1, 3, 7, 9, 21, 43, 63, 71, 129, 163, 213, 301, 387, 489, 497, 639, 903, 1141, 1467, 1491, 2709, 3053, 3423, 4473, 7009, 9159, 10269, 11573, 21027, 21371, 27477, 34719, 49063, 63081, 64113, 81011, 104157, 147189, 192339, 243033, 441567, 497639, 729099, 1492917, 3483473, 4478751, 10450419, 31351257]

約数ペア:

[(1, 31351257), (3, 10450419), (7, 4478751), (9, 3483473), (21, 1492917), (43, 729099), (63, 497639), (71, 441567), (129, 243033), (163, 192339), (213, 147189), (301, 104157), (387, 81011), (489, 64113), (497, 63081), (639, 49063), (903, 34719), (1141, 27477), (1467, 21371), (1491, 21027), (2709, 11573), (3053, 10269), (3423, 9159), (4473, 7009)]