21283015

素因数分解:

$5^1\times {\mathrm{13}}^2\times {\mathrm{89}}^1\times {\mathrm{283}}^1$

素因数の和:403

約数の個数: 24

約数和(自身を含む): 28064880

約数和(自身を除く): 6781865

約数列:

[1, 5, 13, 65, 89, 169, 283, 445, 845, 1157, 1415, 3679, 5785, 15041, 18395, 25187, 47827, 75205, 125935, 239135, 327431, 1637155, 4256603, 21283015]

約数ペア:

[(1, 21283015), (5, 4256603), (13, 1637155), (65, 327431), (89, 239135), (169, 125935), (283, 75205), (445, 47827), (845, 25187), (1157, 18395), (1415, 15041), (3679, 5785)]