18664317

素因数分解:

$3^3\times 7^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{157}}^1$

素因数の和:227

約数の個数: 64

約数和(自身を含む): 34583040

約数和(自身を除く): 15918723

約数列:

[1, 3, 7, 9, 17, 21, 27, 37, 51, 63, 111, 119, 153, 157, 189, 259, 333, 357, 459, 471, 629, 777, 999, 1071, 1099, 1413, 1887, 2331, 2669, 3213, 3297, 4239, 4403, 5661, 5809, 6993, 8007, 9891, 13209, 16983, 17427, 18683, 24021, 29673, 39627, 40663, 52281, 56049, 72063, 98753, 118881, 121989, 156843, 168147, 296259, 365967, 504441, 691271, 888777, 1097901, 2073813, 2666331, 6221439, 18664317]

約数ペア:

[(1, 18664317), (3, 6221439), (7, 2666331), (9, 2073813), (17, 1097901), (21, 888777), (27, 691271), (37, 504441), (51, 365967), (63, 296259), (111, 168147), (119, 156843), (153, 121989), (157, 118881), (189, 98753), (259, 72063), (333, 56049), (357, 52281), (459, 40663), (471, 39627), (629, 29673), (777, 24021), (999, 18683), (1071, 17427), (1099, 16983), (1413, 13209), (1887, 9891), (2331, 8007), (2669, 6993), (3213, 5809), (3297, 5661), (4239, 4403)]