20285990

素因数分解:

$2^1\times 5^1\times {\mathrm{37}}^1\times {\mathrm{109}}^1\times {\mathrm{503}}^1$

素因数の和:656

約数の個数: 32

約数和(自身を含む): 37920960

約数和(自身を除く): 17634970

約数列:

[1, 2, 5, 10, 37, 74, 109, 185, 218, 370, 503, 545, 1006, 1090, 2515, 4033, 5030, 8066, 18611, 20165, 37222, 40330, 54827, 93055, 109654, 186110, 274135, 548270, 2028599, 4057198, 10142995, 20285990]

約数ペア:

[(1, 20285990), (2, 10142995), (5, 4057198), (10, 2028599), (37, 548270), (74, 274135), (109, 186110), (185, 109654), (218, 93055), (370, 54827), (503, 40330), (545, 37222), (1006, 20165), (1090, 18611), (2515, 8066), (4033, 5030)]