20972055

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{8273}}^1$

素因数の和:8307

約数の個数: 24

約数和(自身を含む): 36339408

約数和(自身を除く): 15367353

約数列:

[1, 3, 5, 13, 15, 39, 65, 169, 195, 507, 845, 2535, 8273, 24819, 41365, 107549, 124095, 322647, 537745, 1398137, 1613235, 4194411, 6990685, 20972055]

約数ペア:

[(1, 20972055), (3, 6990685), (5, 4194411), (13, 1613235), (15, 1398137), (39, 537745), (65, 322647), (169, 124095), (195, 107549), (507, 41365), (845, 24819), (2535, 8273)]