21521493

素因数分解:

$3^2\times 7^1\times {\mathrm{251}}^1\times {\mathrm{1361}}^1$

素因数の和:1625

約数の個数: 24

約数和(自身を含む): 35695296

約数和(自身を除く): 14173803

約数列:

[1, 3, 7, 9, 21, 63, 251, 753, 1361, 1757, 2259, 4083, 5271, 9527, 12249, 15813, 28581, 85743, 341611, 1024833, 2391277, 3074499, 7173831, 21521493]

約数ペア:

[(1, 21521493), (3, 7173831), (7, 3074499), (9, 2391277), (21, 1024833), (63, 341611), (251, 85743), (753, 28581), (1361, 15813), (1757, 12249), (2259, 9527), (4083, 5271)]