21057555

素因数分解:

$3^1\times 5^1\times {\mathrm{727}}^1\times {\mathrm{1931}}^1$

素因数の和:2666

約数の個数: 16

約数和(自身を含む): 33755904

約数和(自身を除く): 12698349

約数列:

[1, 3, 5, 15, 727, 1931, 2181, 3635, 5793, 9655, 10905, 28965, 1403837, 4211511, 7019185, 21057555]

約数ペア:

[(1, 21057555), (3, 7019185), (5, 4211511), (15, 1403837), (727, 28965), (1931, 10905), (2181, 9655), (3635, 5793)]