21257128

素因数分解:

$2^3\times {\mathrm{631}}^1\times {\mathrm{4211}}^1$

素因数の和:4848

約数の個数: 16

約数和(自身を含む): 39929760

約数和(自身を除く): 18672632

約数列:

[1, 2, 4, 8, 631, 1262, 2524, 4211, 5048, 8422, 16844, 33688, 2657141, 5314282, 10628564, 21257128]

約数ペア:

[(1, 21257128), (2, 10628564), (4, 5314282), (8, 2657141), (631, 33688), (1262, 16844), (2524, 8422), (4211, 5048)]