21580565

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{307}}^1\times {\mathrm{827}}^1$

素因数の和:1156

約数の個数: 16

約数和(自身を含む): 27542592

約数和(自身を除く): 5962027

約数列:

[1, 5, 17, 85, 307, 827, 1535, 4135, 5219, 14059, 26095, 70295, 253889, 1269445, 4316113, 21580565]

約数ペア:

[(1, 21580565), (5, 4316113), (17, 1269445), (85, 253889), (307, 70295), (827, 26095), (1535, 14059), (4135, 5219)]