21511275

素因数分解:

$3^1\times 5^2\times {\mathrm{73}}^1\times {\mathrm{3929}}^1$

素因数の和:4015

約数の個数: 24

約数和(自身を含む): 36061680

約数和(自身を除く): 14550405

約数列:

[1, 3, 5, 15, 25, 73, 75, 219, 365, 1095, 1825, 3929, 5475, 11787, 19645, 58935, 98225, 286817, 294675, 860451, 1434085, 4302255, 7170425, 21511275]

約数ペア:

[(1, 21511275), (3, 7170425), (5, 4302255), (15, 1434085), (25, 860451), (73, 294675), (75, 286817), (219, 98225), (365, 58935), (1095, 19645), (1825, 11787), (3929, 5475)]