21868847

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{3121}}^1$

素因数の和:3159

約数の個数: 24

約数和(自身を含む): 29896272

約数和(自身を除く): 8027425

約数列:

[1, 7, 11, 13, 49, 77, 91, 143, 539, 637, 1001, 3121, 7007, 21847, 34331, 40573, 152929, 240317, 284011, 446303, 1682219, 1988077, 3124121, 21868847]

約数ペア:

[(1, 21868847), (7, 3124121), (11, 1988077), (13, 1682219), (49, 446303), (77, 284011), (91, 240317), (143, 152929), (539, 40573), (637, 34331), (1001, 21847), (3121, 7007)]