20678637

素因数分解:

$3^1\times 7^2\times {\mathrm{41}}^1\times {\mathrm{47}}^1\times {\mathrm{73}}^1$

素因数の和:178

約数の個数: 48

約数和(自身を含む): 34013952

約数和(自身を除く): 13335315

約数列:

[1, 3, 7, 21, 41, 47, 49, 73, 123, 141, 147, 219, 287, 329, 511, 861, 987, 1533, 1927, 2009, 2303, 2993, 3431, 3577, 5781, 6027, 6909, 8979, 10293, 10731, 13489, 20951, 24017, 40467, 62853, 72051, 94423, 140671, 146657, 168119, 283269, 422013, 439971, 504357, 984697, 2954091, 6892879, 20678637]

約数ペア:

[(1, 20678637), (3, 6892879), (7, 2954091), (21, 984697), (41, 504357), (47, 439971), (49, 422013), (73, 283269), (123, 168119), (141, 146657), (147, 140671), (219, 94423), (287, 72051), (329, 62853), (511, 40467), (861, 24017), (987, 20951), (1533, 13489), (1927, 10731), (2009, 10293), (2303, 8979), (2993, 6909), (3431, 6027), (3577, 5781)]