20819835

素因数分解:

$3^4\times 5^1\times {\mathrm{51407}}^1$

素因数の和:51424

約数の個数: 20

約数和(自身を含む): 37322208

約数和(自身を除く): 16502373

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 51407, 154221, 257035, 462663, 771105, 1387989, 2313315, 4163967, 6939945, 20819835]

約数ペア:

[(1, 20819835), (3, 6939945), (5, 4163967), (9, 2313315), (15, 1387989), (27, 771105), (45, 462663), (81, 257035), (135, 154221), (405, 51407)]