218784321

素因数分解:

$3^5\times 7^1\times {\mathrm{128621}}^1$

素因数の和:128643

約数の個数: 24

約数和(自身を含む): 374547264

約数和(自身を除く): 155762943

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 243, 567, 1701, 128621, 385863, 900347, 1157589, 2701041, 3472767, 8103123, 10418301, 24309369, 31254903, 72928107, 218784321]

約数ペア:

[(1, 218784321), (3, 72928107), (7, 31254903), (9, 24309369), (21, 10418301), (27, 8103123), (63, 3472767), (81, 2701041), (189, 1157589), (243, 900347), (567, 385863), (1701, 128621)]