21506345

素因数分解:

$5^1\times 7^2\times {\mathrm{41}}^1\times {\mathrm{2141}}^1$

素因数の和:2201

約数の個数: 24

約数和(自身を含む): 30767688

約数和(自身を除く): 9261343

約数列:

[1, 5, 7, 35, 41, 49, 205, 245, 287, 1435, 2009, 2141, 10045, 10705, 14987, 74935, 87781, 104909, 438905, 524545, 614467, 3072335, 4301269, 21506345]

約数ペア:

[(1, 21506345), (5, 4301269), (7, 3072335), (35, 614467), (41, 524545), (49, 438905), (205, 104909), (245, 87781), (287, 74935), (1435, 14987), (2009, 10705), (2141, 10045)]