21576989

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{3061}}^1$

素因数の和:3140

約数の個数: 16

約数和(自身を含む): 26455680

約数和(自身を除く): 4878691

約数列:

[1, 7, 19, 53, 133, 371, 1007, 3061, 7049, 21427, 58159, 162233, 407113, 1135631, 3082427, 21576989]

約数ペア:

[(1, 21576989), (7, 3082427), (19, 1135631), (53, 407113), (133, 162233), (371, 58159), (1007, 21427), (3061, 7049)]