21782865

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{6571}}^1$

素因数の和:6609

約数の個数: 32

約数和(自身を含む): 39747456

約数和(自身を除く): 17964591

約数列:

[1, 3, 5, 13, 15, 17, 39, 51, 65, 85, 195, 221, 255, 663, 1105, 3315, 6571, 19713, 32855, 85423, 98565, 111707, 256269, 335121, 427115, 558535, 1281345, 1452191, 1675605, 4356573, 7260955, 21782865]

約数ペア:

[(1, 21782865), (3, 7260955), (5, 4356573), (13, 1675605), (15, 1452191), (17, 1281345), (39, 558535), (51, 427115), (65, 335121), (85, 256269), (195, 111707), (221, 98565), (255, 85423), (663, 32855), (1105, 19713), (3315, 6571)]