21790539

素因数分解:

$3^6\times {\mathrm{71}}^1\times {\mathrm{421}}^1$

素因数の和:510

約数の個数: 28

約数和(自身を含む): 33209712

約数和(自身を除く): 11419173

約数列:

[1, 3, 9, 27, 71, 81, 213, 243, 421, 639, 729, 1263, 1917, 3789, 5751, 11367, 17253, 29891, 34101, 51759, 89673, 102303, 269019, 306909, 807057, 2421171, 7263513, 21790539]

約数ペア:

[(1, 21790539), (3, 7263513), (9, 2421171), (27, 807057), (71, 306909), (81, 269019), (213, 102303), (243, 89673), (421, 51759), (639, 34101), (729, 29891), (1263, 17253), (1917, 11367), (3789, 5751)]