20849905

素因数分解:

$5^1\times {\mathrm{17}}^2\times {\mathrm{47}}^1\times {\mathrm{307}}^1$

素因数の和:393

約数の個数: 24

約数和(自身を含む): 27232128

約数和(自身を除く): 6382223

約数列:

[1, 5, 17, 47, 85, 235, 289, 307, 799, 1445, 1535, 3995, 5219, 13583, 14429, 26095, 67915, 72145, 88723, 245293, 443615, 1226465, 4169981, 20849905]

約数ペア:

[(1, 20849905), (5, 4169981), (17, 1226465), (47, 443615), (85, 245293), (235, 88723), (289, 72145), (307, 67915), (799, 26095), (1445, 14429), (1535, 13583), (3995, 5219)]