21381305

素因数分解:

$5^1\times {\mathrm{11}}^2\times {\mathrm{59}}^1\times {\mathrm{599}}^1$

素因数の和:685

約数の個数: 24

約数和(自身を含む): 28728000

約数和(自身を除く): 7346695

約数列:

[1, 5, 11, 55, 59, 121, 295, 599, 605, 649, 2995, 3245, 6589, 7139, 32945, 35341, 35695, 72479, 176705, 362395, 388751, 1943755, 4276261, 21381305]

約数ペア:

[(1, 21381305), (5, 4276261), (11, 1943755), (55, 388751), (59, 362395), (121, 176705), (295, 72479), (599, 35695), (605, 35341), (649, 32945), (2995, 7139), (3245, 6589)]