20809815

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{8209}}^1$

素因数の和:8243

約数の個数: 24

約数和(自身を含む): 36058320

約数和(自身を除く): 15248505

約数列:

[1, 3, 5, 13, 15, 39, 65, 169, 195, 507, 845, 2535, 8209, 24627, 41045, 106717, 123135, 320151, 533585, 1387321, 1600755, 4161963, 6936605, 20809815]

約数ペア:

[(1, 20809815), (3, 6936605), (5, 4161963), (13, 1600755), (15, 1387321), (39, 533585), (65, 320151), (169, 123135), (195, 106717), (507, 41045), (845, 24627), (2535, 8209)]