21139489

素因数分解:

$7^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{1597}}^1$

素因数の和:1696

約数の個数: 16

約数和(自身を含む): 25363456

約数和(自身を除く): 4223967

約数列:

[1, 7, 31, 61, 217, 427, 1597, 1891, 11179, 13237, 49507, 97417, 346549, 681919, 3019927, 21139489]

約数ペア:

[(1, 21139489), (7, 3019927), (31, 681919), (61, 346549), (217, 97417), (427, 49507), (1597, 13237), (1891, 11179)]