21742567

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{12277}}^1$

素因数の和:12318

約数の個数: 16

約数和(自身を含む): 28288512

約数和(自身を除く): 6545945

約数列:

[1, 7, 11, 23, 77, 161, 253, 1771, 12277, 85939, 135047, 282371, 945329, 1976597, 3106081, 21742567]

約数ペア:

[(1, 21742567), (7, 3106081), (11, 1976597), (23, 945329), (77, 282371), (161, 135047), (253, 85939), (1771, 12277)]