28128009

素因数分解:

$3^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{359}}^1$

素因数の和:430

約数の個数: 48

約数和(自身を含む): 48263040

約数和(自身を除く): 20135031

約数列:

[1, 3, 7, 13, 21, 39, 41, 49, 91, 123, 147, 273, 287, 359, 533, 637, 861, 1077, 1599, 1911, 2009, 2513, 3731, 4667, 6027, 7539, 11193, 14001, 14719, 17591, 26117, 32669, 44157, 52773, 78351, 98007, 103033, 191347, 228683, 309099, 574041, 686049, 721231, 1339429, 2163693, 4018287, 9376003, 28128009]

約数ペア:

[(1, 28128009), (3, 9376003), (7, 4018287), (13, 2163693), (21, 1339429), (39, 721231), (41, 686049), (49, 574041), (91, 309099), (123, 228683), (147, 191347), (273, 103033), (287, 98007), (359, 78351), (533, 52773), (637, 44157), (861, 32669), (1077, 26117), (1599, 17591), (1911, 14719), (2009, 14001), (2513, 11193), (3731, 7539), (4667, 6027)]