21666555

素因数分解:

$3^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{8447}}^1$

素因数の和:8480

約数の個数: 32

約数和(自身を含む): 40550400

約数和(自身を除く): 18883845

約数列:

[1, 3, 5, 9, 15, 19, 27, 45, 57, 95, 135, 171, 285, 513, 855, 2565, 8447, 25341, 42235, 76023, 126705, 160493, 228069, 380115, 481479, 802465, 1140345, 1444437, 2407395, 4333311, 7222185, 21666555]

約数ペア:

[(1, 21666555), (3, 7222185), (5, 4333311), (9, 2407395), (15, 1444437), (19, 1140345), (27, 802465), (45, 481479), (57, 380115), (95, 228069), (135, 160493), (171, 126705), (285, 76023), (513, 42235), (855, 25341), (2565, 8447)]