21286727

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{73}}^1\times {\mathrm{541}}^1$

素因数の和:639

約数の個数: 24

約数和(自身を含む): 27433872

約数和(自身を除く): 6147145

約数列:

[1, 7, 11, 49, 73, 77, 511, 539, 541, 803, 3577, 3787, 5621, 5951, 26509, 39347, 39493, 41657, 276451, 291599, 434423, 1935157, 3040961, 21286727]

約数ペア:

[(1, 21286727), (7, 3040961), (11, 1935157), (49, 434423), (73, 291599), (77, 276451), (511, 41657), (539, 39493), (541, 39347), (803, 26509), (3577, 5951), (3787, 5621)]