128520728

素因数分解:

$2^3\times 7^4\times {\mathrm{6691}}^1$

素因数の和:6725

約数の個数: 40

約数和(自身を含む): 281164380

約数和(自身を除く): 152643652

約数列:

[1, 2, 4, 7, 8, 14, 28, 49, 56, 98, 196, 343, 392, 686, 1372, 2401, 2744, 4802, 6691, 9604, 13382, 19208, 26764, 46837, 53528, 93674, 187348, 327859, 374696, 655718, 1311436, 2295013, 2622872, 4590026, 9180052, 16065091, 18360104, 32130182, 64260364, 128520728]

約数ペア:

[(1, 128520728), (2, 64260364), (4, 32130182), (7, 18360104), (8, 16065091), (14, 9180052), (28, 4590026), (49, 2622872), (56, 2295013), (98, 1311436), (196, 655718), (343, 374696), (392, 327859), (686, 187348), (1372, 93674), (2401, 53528), (2744, 46837), (4802, 26764), (6691, 19208), (9604, 13382)]