21238085

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{103}}^1\times {\mathrm{163}}^1$

素因数の和:305

約数の個数: 32

約数和(自身を含む): 29472768

約数和(自身を除く): 8234683

約数列:

[1, 5, 11, 23, 55, 103, 115, 163, 253, 515, 815, 1133, 1265, 1793, 2369, 3749, 5665, 8965, 11845, 16789, 18745, 26059, 41239, 83945, 130295, 184679, 206195, 386147, 923395, 1930735, 4247617, 21238085]

約数ペア:

[(1, 21238085), (5, 4247617), (11, 1930735), (23, 923395), (55, 386147), (103, 206195), (115, 184679), (163, 130295), (253, 83945), (515, 41239), (815, 26059), (1133, 18745), (1265, 16789), (1793, 11845), (2369, 8965), (3749, 5665)]