21247863

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^2\times {\mathrm{5987}}^1$

素因数の和:6023

約数の個数: 24

約数和(自身を含む): 35065728

約数和(自身を除く): 13817865

約数列:

[1, 3, 7, 13, 21, 39, 91, 169, 273, 507, 1183, 3549, 5987, 17961, 41909, 77831, 125727, 233493, 544817, 1011803, 1634451, 3035409, 7082621, 21247863]

約数ペア:

[(1, 21247863), (3, 7082621), (7, 3035409), (13, 1634451), (21, 1011803), (39, 544817), (91, 233493), (169, 125727), (273, 77831), (507, 41909), (1183, 17961), (3549, 5987)]