21139617

素因数分解:

$3^1\times {\mathrm{37}}^1\times {\mathrm{43}}^2\times {\mathrm{103}}^1$

素因数の和:229

約数の個数: 24

約数和(自身を含む): 29924544

約数和(自身を除く): 8784927

約数列:

[1, 3, 37, 43, 103, 111, 129, 309, 1591, 1849, 3811, 4429, 4773, 5547, 11433, 13287, 68413, 163873, 190447, 205239, 491619, 571341, 7046539, 21139617]

約数ペア:

[(1, 21139617), (3, 7046539), (37, 571341), (43, 491619), (103, 205239), (111, 190447), (129, 163873), (309, 68413), (1591, 13287), (1849, 11433), (3811, 5547), (4429, 4773)]