20647305

素因数分解:

$3^4\times 5^1\times 7^1\times {\mathrm{7283}}^1$

素因数の和:7307

約数の個数: 40

約数和(自身を含む): 42305472

約数和(自身を除く): 21658167

約数列:

[1, 3, 5, 7, 9, 15, 21, 27, 35, 45, 63, 81, 105, 135, 189, 315, 405, 567, 945, 2835, 7283, 21849, 36415, 50981, 65547, 109245, 152943, 196641, 254905, 327735, 458829, 589923, 764715, 983205, 1376487, 2294145, 2949615, 4129461, 6882435, 20647305]

約数ペア:

[(1, 20647305), (3, 6882435), (5, 4129461), (7, 2949615), (9, 2294145), (15, 1376487), (21, 983205), (27, 764715), (35, 589923), (45, 458829), (63, 327735), (81, 254905), (105, 196641), (135, 152943), (189, 109245), (315, 65547), (405, 50981), (567, 36415), (945, 21849), (2835, 7283)]