81480815

素因数分解:

$5^1\times {\mathrm{13}}^2\times {\mathrm{211}}^1\times {\mathrm{457}}^1$

素因数の和:699

約数の個数: 24

約数和(自身を含む): 106611408

約数和(自身を除く): 25130593

約数列:

[1, 5, 13, 65, 169, 211, 457, 845, 1055, 2285, 2743, 5941, 13715, 29705, 35659, 77233, 96427, 178295, 386165, 482135, 1253551, 6267755, 16296163, 81480815]

約数ペア:

[(1, 81480815), (5, 16296163), (13, 6267755), (65, 1253551), (169, 482135), (211, 386165), (457, 178295), (845, 96427), (1055, 77233), (2285, 35659), (2743, 29705), (5941, 13715)]