20687755

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{53}}^1\times {\mathrm{151}}^1$

素因数の和:267

約数の個数: 32

約数和(自身を含む): 28366848

約数和(自身を除く): 7679093

約数列:

[1, 5, 11, 47, 53, 55, 151, 235, 265, 517, 583, 755, 1661, 2491, 2585, 2915, 7097, 8003, 8305, 12455, 27401, 35485, 40015, 78067, 88033, 137005, 376141, 390335, 440165, 1880705, 4137551, 20687755]

約数ペア:

[(1, 20687755), (5, 4137551), (11, 1880705), (47, 440165), (53, 390335), (55, 376141), (151, 137005), (235, 88033), (265, 78067), (517, 40015), (583, 35485), (755, 27401), (1661, 12455), (2491, 8305), (2585, 8003), (2915, 7097)]