20451963

素因数分解:

$3^1\times 7^2\times {\mathrm{373}}^2$

素因数の和:763

約数の個数: 18

約数和(自身を含む): 31806684

約数和(自身を除く): 11354721

約数列:

[1, 3, 7, 21, 49, 147, 373, 1119, 2611, 7833, 18277, 54831, 139129, 417387, 973903, 2921709, 6817321, 20451963]

約数ペア:

[(1, 20451963), (3, 6817321), (7, 2921709), (21, 973903), (49, 417387), (147, 139129), (373, 54831), (1119, 18277), (2611, 7833)]