21206529

素因数分解:

$3^4\times {\mathrm{23}}^1\times {\mathrm{11383}}^1$

素因数の和:11418

約数の個数: 20

約数和(自身を含む): 33059136

約数和(自身を除く): 11852607

約数列:

[1, 3, 9, 23, 27, 69, 81, 207, 621, 1863, 11383, 34149, 102447, 261809, 307341, 785427, 922023, 2356281, 7068843, 21206529]

約数ペア:

[(1, 21206529), (3, 7068843), (9, 2356281), (23, 922023), (27, 785427), (69, 307341), (81, 261809), (207, 102447), (621, 34149), (1863, 11383)]