18664371

素因数分解:

$3^3\times {\mathrm{11}}^2\times {\mathrm{29}}^1\times {\mathrm{197}}^1$

素因数の和:257

約数の個数: 48

約数和(自身を含む): 31600800

約数和(自身を除く): 12936429

約数列:

[1, 3, 9, 11, 27, 29, 33, 87, 99, 121, 197, 261, 297, 319, 363, 591, 783, 957, 1089, 1773, 2167, 2871, 3267, 3509, 5319, 5713, 6501, 8613, 10527, 17139, 19503, 23837, 31581, 51417, 58509, 62843, 71511, 94743, 154251, 188529, 214533, 565587, 643599, 691273, 1696761, 2073819, 6221457, 18664371]

約数ペア:

[(1, 18664371), (3, 6221457), (9, 2073819), (11, 1696761), (27, 691273), (29, 643599), (33, 565587), (87, 214533), (99, 188529), (121, 154251), (197, 94743), (261, 71511), (297, 62843), (319, 58509), (363, 51417), (591, 31581), (783, 23837), (957, 19503), (1089, 17139), (1773, 10527), (2167, 8613), (2871, 6501), (3267, 5713), (3509, 5319)]