18746721

素因数分解:

$3^5\times 7^1\times {\mathrm{103}}^1\times {\mathrm{107}}^1$

素因数の和:232

約数の個数: 48

約数和(自身を含む): 32707584

約数和(自身を除く): 13960863

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 103, 107, 189, 243, 309, 321, 567, 721, 749, 927, 963, 1701, 2163, 2247, 2781, 2889, 6489, 6741, 8343, 8667, 11021, 19467, 20223, 25029, 26001, 33063, 58401, 60669, 77147, 99189, 175203, 182007, 231441, 297567, 694323, 892701, 2082969, 2678103, 6248907, 18746721]

約数ペア:

[(1, 18746721), (3, 6248907), (7, 2678103), (9, 2082969), (21, 892701), (27, 694323), (63, 297567), (81, 231441), (103, 182007), (107, 175203), (189, 99189), (243, 77147), (309, 60669), (321, 58401), (567, 33063), (721, 26001), (749, 25029), (927, 20223), (963, 19467), (1701, 11021), (2163, 8667), (2247, 8343), (2781, 6741), (2889, 6489)]