21404537

素因数分解:

$7^1\times {\mathrm{11}}^2\times {\mathrm{37}}^1\times {\mathrm{683}}^1$

素因数の和:749

約数の個数: 24

約数和(自身を含む): 27655488

約数和(自身を除く): 6250951

約数列:

[1, 7, 11, 37, 77, 121, 259, 407, 683, 847, 2849, 4477, 4781, 7513, 25271, 31339, 52591, 82643, 176897, 277981, 578501, 1945867, 3057791, 21404537]

約数ペア:

[(1, 21404537), (7, 3057791), (11, 1945867), (37, 578501), (77, 277981), (121, 176897), (259, 82643), (407, 52591), (683, 31339), (847, 25271), (2849, 7513), (4477, 4781)]