20947135

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{571}}^1$

素因数の和:639

約数の個数: 32

約数和(自身を含む): 29652480

約数和(自身を除く): 8705345

約数列:

[1, 5, 11, 23, 29, 55, 115, 145, 253, 319, 571, 667, 1265, 1595, 2855, 3335, 6281, 7337, 13133, 16559, 31405, 36685, 65665, 82795, 144463, 182149, 380857, 722315, 910745, 1904285, 4189427, 20947135]

約数ペア:

[(1, 20947135), (5, 4189427), (11, 1904285), (23, 910745), (29, 722315), (55, 380857), (115, 182149), (145, 144463), (253, 82795), (319, 65665), (571, 36685), (667, 31405), (1265, 16559), (1595, 13133), (2855, 7337), (3335, 6281)]