81249987

素因数分解:

$3^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{61}}^1$

素因数の和:149

約数の個数: 96

約数和(自身を含む): 149615424

約数和(自身を除く): 68365437

約数列:

[1, 3, 7, 13, 17, 21, 39, 41, 49, 51, 61, 91, 119, 123, 147, 183, 221, 273, 287, 357, 427, 533, 637, 663, 697, 793, 833, 861, 1037, 1281, 1547, 1599, 1911, 2009, 2091, 2379, 2499, 2501, 2989, 3111, 3731, 4641, 4879, 5551, 6027, 7259, 7503, 8967, 9061, 10829, 11193, 13481, 14637, 16653, 17507, 21777, 26117, 27183, 32487, 32513, 34153, 38857, 40443, 42517, 50813, 52521, 63427, 78351, 94367, 97539, 102459, 116571, 122549, 127551, 152439, 190281, 227591, 283101, 297619, 367647, 443989, 552721, 660569, 682773, 892857, 1331967, 1593137, 1658163, 1981707, 2083333, 3869047, 4779411, 6249999, 11607141, 27083329, 81249987]

約数ペア:

[(1, 81249987), (3, 27083329), (7, 11607141), (13, 6249999), (17, 4779411), (21, 3869047), (39, 2083333), (41, 1981707), (49, 1658163), (51, 1593137), (61, 1331967), (91, 892857), (119, 682773), (123, 660569), (147, 552721), (183, 443989), (221, 367647), (273, 297619), (287, 283101), (357, 227591), (427, 190281), (533, 152439), (637, 127551), (663, 122549), (697, 116571), (793, 102459), (833, 97539), (861, 94367), (1037, 78351), (1281, 63427), (1547, 52521), (1599, 50813), (1911, 42517), (2009, 40443), (2091, 38857), (2379, 34153), (2499, 32513), (2501, 32487), (2989, 27183), (3111, 26117), (3731, 21777), (4641, 17507), (4879, 16653), (5551, 14637), (6027, 13481), (7259, 11193), (7503, 10829), (8967, 9061)]