18906993

素因数分解:

$3^3\times 7^2\times {\mathrm{31}}^1\times {\mathrm{461}}^1$

素因数の和:515

約数の個数: 48

約数和(自身を含む): 33707520

約数和(自身を除く): 14800527

約数列:

[1, 3, 7, 9, 21, 27, 31, 49, 63, 93, 147, 189, 217, 279, 441, 461, 651, 837, 1323, 1383, 1519, 1953, 3227, 4149, 4557, 5859, 9681, 12447, 13671, 14291, 22589, 29043, 41013, 42873, 67767, 87129, 100037, 128619, 203301, 300111, 385857, 609903, 700259, 900333, 2100777, 2700999, 6302331, 18906993]

約数ペア:

[(1, 18906993), (3, 6302331), (7, 2700999), (9, 2100777), (21, 900333), (27, 700259), (31, 609903), (49, 385857), (63, 300111), (93, 203301), (147, 128619), (189, 100037), (217, 87129), (279, 67767), (441, 42873), (461, 41013), (651, 29043), (837, 22589), (1323, 14291), (1383, 13671), (1519, 12447), (1953, 9681), (3227, 5859), (4149, 4557)]