21919905

素因数分解:

$3^2\times 5^1\times 7^2\times {\mathrm{9941}}^1$

素因数の和:9966

約数の個数: 36

約数和(自身を含む): 44202132

約数和(自身を除く): 22282227

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 49, 63, 105, 147, 245, 315, 441, 735, 2205, 9941, 29823, 49705, 69587, 89469, 149115, 208761, 347935, 447345, 487109, 626283, 1043805, 1461327, 2435545, 3131415, 4383981, 7306635, 21919905]

約数ペア:

[(1, 21919905), (3, 7306635), (5, 4383981), (7, 3131415), (9, 2435545), (15, 1461327), (21, 1043805), (35, 626283), (45, 487109), (49, 447345), (63, 347935), (105, 208761), (147, 149115), (245, 89469), (315, 69587), (441, 49705), (735, 29823), (2205, 9941)]