21190521

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{27919}}^1$

素因数の和:27956

約数の個数: 16

約数和(自身を含む): 32163840

約数和(自身を除く): 10973319

約数列:

[1, 3, 11, 23, 33, 69, 253, 759, 27919, 83757, 307109, 642137, 921327, 1926411, 7063507, 21190521]

約数ペア:

[(1, 21190521), (3, 7063507), (11, 1926411), (23, 921327), (33, 642137), (69, 307109), (253, 83757), (759, 27919)]