81385815

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{110729}}^1$

素因数の和:110751

約数の個数: 24

約数和(自身を含む): 151478640

約数和(自身を除く): 70092825

約数列:

[1, 3, 5, 7, 15, 21, 35, 49, 105, 147, 245, 735, 110729, 332187, 553645, 775103, 1660935, 2325309, 3875515, 5425721, 11626545, 16277163, 27128605, 81385815]

約数ペア:

[(1, 81385815), (3, 27128605), (5, 16277163), (7, 11626545), (15, 5425721), (21, 3875515), (35, 2325309), (49, 1660935), (105, 775103), (147, 553645), (245, 332187), (735, 110729)]