20895903

素因数分解:

$3^2\times 7^4\times {\mathrm{967}}^1$

素因数の和:1001

約数の個数: 30

約数和(自身を含む): 35247784

約数和(自身を除く): 14351881

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 343, 441, 967, 1029, 2401, 2901, 3087, 6769, 7203, 8703, 20307, 21609, 47383, 60921, 142149, 331681, 426447, 995043, 2321767, 2985129, 6965301, 20895903]

約数ペア:

[(1, 20895903), (3, 6965301), (7, 2985129), (9, 2321767), (21, 995043), (49, 426447), (63, 331681), (147, 142149), (343, 60921), (441, 47383), (967, 21609), (1029, 20307), (2401, 8703), (2901, 7203), (3087, 6769)]