28747305

素因数分解:

$3^4\times 5^1\times {\mathrm{70981}}^1$

素因数の和:70998

約数の個数: 20

約数和(自身を含む): 51532932

約数和(自身を除く): 22785627

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 70981, 212943, 354905, 638829, 1064715, 1916487, 3194145, 5749461, 9582435, 28747305]

約数ペア:

[(1, 28747305), (3, 9582435), (5, 5749461), (9, 3194145), (15, 1916487), (27, 1064715), (45, 638829), (81, 354905), (135, 212943), (405, 70981)]