21392449

素因数分解:

${\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{109}}^1\times {\mathrm{487}}^1$

素因数の和:640

約数の個数: 16

約数和(自身を含む): 24048640

約数和(自身を除く): 2656191

約数列:

[1, 13, 31, 109, 403, 487, 1417, 3379, 6331, 15097, 43927, 53083, 196261, 690079, 1645573, 21392449]

約数ペア:

[(1, 21392449), (13, 1645573), (31, 690079), (109, 196261), (403, 53083), (487, 43927), (1417, 15097), (3379, 6331)]