21880215

素因数分解:

$3^2\times 5^1\times 7^2\times {\mathrm{9923}}^1$

素因数の和:9948

約数の個数: 36

約数和(自身を含む): 44122104

約数和(自身を除く): 22241889

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 49, 63, 105, 147, 245, 315, 441, 735, 2205, 9923, 29769, 49615, 69461, 89307, 148845, 208383, 347305, 446535, 486227, 625149, 1041915, 1458681, 2431135, 3125745, 4376043, 7293405, 21880215]

約数ペア:

[(1, 21880215), (3, 7293405), (5, 4376043), (7, 3125745), (9, 2431135), (15, 1458681), (21, 1041915), (35, 625149), (45, 486227), (49, 446535), (63, 347305), (105, 208383), (147, 148845), (245, 89307), (315, 69461), (441, 49615), (735, 29769), (2205, 9923)]