20896281

素因数分解:

$3^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{109}}^1\times {\mathrm{179}}^1$

素因数の和:318

約数の個数: 48

約数和(自身を含む): 37065600

約数和(自身を除く): 16169319

約数列:

[1, 3, 7, 9, 17, 21, 51, 63, 109, 119, 153, 179, 327, 357, 537, 763, 981, 1071, 1253, 1611, 1853, 2289, 3043, 3759, 5559, 6867, 9129, 11277, 12971, 16677, 19511, 21301, 27387, 38913, 58533, 63903, 116739, 136577, 175599, 191709, 331687, 409731, 995061, 1229193, 2321809, 2985183, 6965427, 20896281]

約数ペア:

[(1, 20896281), (3, 6965427), (7, 2985183), (9, 2321809), (17, 1229193), (21, 995061), (51, 409731), (63, 331687), (109, 191709), (119, 175599), (153, 136577), (179, 116739), (327, 63903), (357, 58533), (537, 38913), (763, 27387), (981, 21301), (1071, 19511), (1253, 16677), (1611, 12971), (1853, 11277), (2289, 9129), (3043, 6867), (3759, 5559)]