21004435

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{4051}}^1$

素因数の和:4134

約数の個数: 16

約数和(自身を含む): 27132192

約数和(自身を除く): 6127757

約数列:

[1, 5, 17, 61, 85, 305, 1037, 4051, 5185, 20255, 68867, 247111, 344335, 1235555, 4200887, 21004435]

約数ペア:

[(1, 21004435), (5, 4200887), (17, 1235555), (61, 344335), (85, 247111), (305, 68867), (1037, 20255), (4051, 5185)]