21504147

素因数分解:

$3^1\times 7^1\times {\mathrm{61}}^1\times {\mathrm{16787}}^1$

素因数の和:16858

約数の個数: 16

約数和(自身を含む): 33307392

約数和(自身を除く): 11803245

約数列:

[1, 3, 7, 21, 61, 183, 427, 1281, 16787, 50361, 117509, 352527, 1024007, 3072021, 7168049, 21504147]

約数ペア:

[(1, 21504147), (3, 7168049), (7, 3072021), (21, 1024007), (61, 352527), (183, 117509), (427, 50361), (1281, 16787)]