20401221

素因数分解:

$3^1\times {\mathrm{43}}^1\times {\mathrm{167}}^1\times {\mathrm{947}}^1$

素因数の和:1160

約数の個数: 16

約数和(自身を含む): 28030464

約数和(自身を除く): 7629243

約数列:

[1, 3, 43, 129, 167, 501, 947, 2841, 7181, 21543, 40721, 122163, 158149, 474447, 6800407, 20401221]

約数ペア:

[(1, 20401221), (3, 6800407), (43, 474447), (129, 158149), (167, 122163), (501, 40721), (947, 21543), (2841, 7181)]