20465739

素因数分解:

$3^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{97}}^1\times {\mathrm{197}}^1$

素因数の和:324

約数の個数: 48

約数和(自身を含む): 36324288

約数和(自身を除く): 15858549

約数列:

[1, 3, 7, 9, 17, 21, 51, 63, 97, 119, 153, 197, 291, 357, 591, 679, 873, 1071, 1379, 1649, 1773, 2037, 3349, 4137, 4947, 6111, 10047, 11543, 12411, 14841, 19109, 23443, 30141, 34629, 57327, 70329, 103887, 133763, 171981, 210987, 324853, 401289, 974559, 1203867, 2273971, 2923677, 6821913, 20465739]

約数ペア:

[(1, 20465739), (3, 6821913), (7, 2923677), (9, 2273971), (17, 1203867), (21, 974559), (51, 401289), (63, 324853), (97, 210987), (119, 171981), (153, 133763), (197, 103887), (291, 70329), (357, 57327), (591, 34629), (679, 30141), (873, 23443), (1071, 19109), (1379, 14841), (1649, 12411), (1773, 11543), (2037, 10047), (3349, 6111), (4137, 4947)]