21739209

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{431}}^1$

素因数の和:517

約数の個数: 32

約数和(自身を含む): 32845824

約数和(自身を除く): 11106615

約数列:

[1, 3, 17, 23, 43, 51, 69, 129, 391, 431, 731, 989, 1173, 1293, 2193, 2967, 7327, 9913, 16813, 18533, 21981, 29739, 50439, 55599, 168521, 315061, 426259, 505563, 945183, 1278777, 7246403, 21739209]

約数ペア:

[(1, 21739209), (3, 7246403), (17, 1278777), (23, 945183), (43, 505563), (51, 426259), (69, 315061), (129, 168521), (391, 55599), (431, 50439), (731, 29739), (989, 21981), (1173, 18533), (1293, 16813), (2193, 9913), (2967, 7327)]