21249284

素因数分解:

$2^2\times 7^1\times {\mathrm{89}}^1\times {\mathrm{8527}}^1$

素因数の和:8627

約数の個数: 24

約数和(自身を含む): 42981120

約数和(自身を除く): 21731836

約数列:

[1, 2, 4, 7, 14, 28, 89, 178, 356, 623, 1246, 2492, 8527, 17054, 34108, 59689, 119378, 238756, 758903, 1517806, 3035612, 5312321, 10624642, 21249284]

約数ペア:

[(1, 21249284), (2, 10624642), (4, 5312321), (7, 3035612), (14, 1517806), (28, 758903), (89, 238756), (178, 119378), (356, 59689), (623, 34108), (1246, 17054), (2492, 8527)]