28188951

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{53}}^1$

素因数の和:156

約数の個数: 64

約数和(自身を含む): 48660480

約数和(自身を除く): 20471529

約数列:

[1, 3, 7, 19, 21, 31, 43, 53, 57, 93, 129, 133, 159, 217, 301, 371, 399, 589, 651, 817, 903, 1007, 1113, 1333, 1643, 1767, 2279, 2451, 3021, 3999, 4123, 4929, 5719, 6837, 7049, 9331, 11501, 12369, 15953, 17157, 21147, 25327, 27993, 31217, 34503, 43301, 47859, 70649, 75981, 93651, 129903, 177289, 211947, 218519, 303107, 494543, 531867, 655557, 909321, 1342331, 1483629, 4026993, 9396317, 28188951]

約数ペア:

[(1, 28188951), (3, 9396317), (7, 4026993), (19, 1483629), (21, 1342331), (31, 909321), (43, 655557), (53, 531867), (57, 494543), (93, 303107), (129, 218519), (133, 211947), (159, 177289), (217, 129903), (301, 93651), (371, 75981), (399, 70649), (589, 47859), (651, 43301), (817, 34503), (903, 31217), (1007, 27993), (1113, 25327), (1333, 21147), (1643, 17157), (1767, 15953), (2279, 12369), (2451, 11501), (3021, 9331), (3999, 7049), (4123, 6837), (4929, 5719)]