18778851

素因数分解:

$3^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{7643}}^1$

素因数の和:7672

約数の個数: 32

約数和(自身を含む): 34245120

約数和(自身を除く): 15466269

約数列:

[1, 3, 7, 9, 13, 21, 27, 39, 63, 91, 117, 189, 273, 351, 819, 2457, 7643, 22929, 53501, 68787, 99359, 160503, 206361, 298077, 481509, 695513, 894231, 1444527, 2086539, 2682693, 6259617, 18778851]

約数ペア:

[(1, 18778851), (3, 6259617), (7, 2682693), (9, 2086539), (13, 1444527), (21, 894231), (27, 695513), (39, 481509), (63, 298077), (91, 206361), (117, 160503), (189, 99359), (273, 68787), (351, 53501), (819, 22929), (2457, 7643)]