19810287

素因数分解:

$3^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{349}}^1$

素因数の和:432

約数の個数: 48

約数和(自身を含む): 35380800

約数和(自身を除く): 15570513

約数列:

[1, 3, 7, 9, 17, 21, 51, 53, 63, 119, 153, 159, 349, 357, 371, 477, 901, 1047, 1071, 1113, 2443, 2703, 3141, 3339, 5933, 6307, 7329, 8109, 17799, 18497, 18921, 21987, 41531, 53397, 55491, 56763, 124593, 129479, 166473, 314449, 373779, 388437, 943347, 1165311, 2201143, 2830041, 6603429, 19810287]

約数ペア:

[(1, 19810287), (3, 6603429), (7, 2830041), (9, 2201143), (17, 1165311), (21, 943347), (51, 388437), (53, 373779), (63, 314449), (119, 166473), (153, 129479), (159, 124593), (349, 56763), (357, 55491), (371, 53397), (477, 41531), (901, 21987), (1047, 18921), (1071, 18497), (1113, 17799), (2443, 8109), (2703, 7329), (3141, 6307), (3339, 5933)]