21081615

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{1759}}^1$

素因数の和:1831

約数の個数: 32

約数和(自身を含む): 36495360

約数和(自身を除く): 15413745

約数列:

[1, 3, 5, 15, 17, 47, 51, 85, 141, 235, 255, 705, 799, 1759, 2397, 3995, 5277, 8795, 11985, 26385, 29903, 82673, 89709, 149515, 248019, 413365, 448545, 1240095, 1405441, 4216323, 7027205, 21081615]

約数ペア:

[(1, 21081615), (3, 7027205), (5, 4216323), (15, 1405441), (17, 1240095), (47, 448545), (51, 413365), (85, 248019), (141, 149515), (235, 89709), (255, 82673), (705, 29903), (799, 26385), (1759, 11985), (2397, 8795), (3995, 5277)]