21517640

素因数分解:

$2^3\times 5^1\times {\mathrm{537941}}^1$

素因数の和:537952

約数の個数: 16

約数和(自身を含む): 48414780

約数和(自身を除く): 26897140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 537941, 1075882, 2151764, 2689705, 4303528, 5379410, 10758820, 21517640]

約数ペア:

[(1, 21517640), (2, 10758820), (4, 5379410), (5, 4303528), (8, 2689705), (10, 2151764), (20, 1075882), (40, 537941)]