21247731

素因数分解:

$3^3\times {\mathrm{37}}^1\times {\mathrm{21269}}^1$

素因数の和:21315

約数の個数: 16

約数和(自身を含む): 32330400

約数和(自身を除く): 11082669

約数列:

[1, 3, 9, 27, 37, 111, 333, 999, 21269, 63807, 191421, 574263, 786953, 2360859, 7082577, 21247731]

約数ペア:

[(1, 21247731), (3, 7082577), (9, 2360859), (27, 786953), (37, 574263), (111, 191421), (333, 63807), (999, 21269)]