21004235

素因数分解:

$5^1\times 7^1\times {\mathrm{571}}^1\times {\mathrm{1051}}^1$

素因数の和:1634

約数の個数: 16

約数和(自身を含む): 28883712

約数和(自身を除く): 7879477

約数列:

[1, 5, 7, 35, 571, 1051, 2855, 3997, 5255, 7357, 19985, 36785, 600121, 3000605, 4200847, 21004235]

約数ペア:

[(1, 21004235), (5, 4200847), (7, 3000605), (35, 600121), (571, 36785), (1051, 19985), (2855, 7357), (3997, 5255)]