21653487

素因数分解:

$3^7\times {\mathrm{9901}}^1$

素因数の和:9922

約数の個数: 16

約数和(自身を含む): 32478560

約数和(自身を除く): 10825073

約数列:

[1, 3, 9, 27, 81, 243, 729, 2187, 9901, 29703, 89109, 267327, 801981, 2405943, 7217829, 21653487]

約数ペア:

[(1, 21653487), (3, 7217829), (9, 2405943), (27, 801981), (81, 267327), (243, 89109), (729, 29703), (2187, 9901)]