20938113

素因数分解:

$3^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{151}}^1$

素因数の和:266

約数の個数: 48

約数和(自身を含む): 36421632

約数和(自身を除く): 15483519

約数列:

[1, 3, 7, 9, 21, 31, 63, 71, 93, 151, 213, 217, 279, 453, 497, 639, 651, 1057, 1359, 1491, 1953, 2201, 3171, 4473, 4681, 6603, 9513, 10721, 14043, 15407, 19809, 32163, 32767, 42129, 46221, 75047, 96489, 98301, 138663, 225141, 294903, 332351, 675423, 997053, 2326457, 2991159, 6979371, 20938113]

約数ペア:

[(1, 20938113), (3, 6979371), (7, 2991159), (9, 2326457), (21, 997053), (31, 675423), (63, 332351), (71, 294903), (93, 225141), (151, 138663), (213, 98301), (217, 96489), (279, 75047), (453, 46221), (497, 42129), (639, 32767), (651, 32163), (1057, 19809), (1359, 15407), (1491, 14043), (1953, 10721), (2201, 9513), (3171, 6603), (4473, 4681)]