21715155

素因数分解:

$3^3\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{2089}}^1$

素因数の和:2121

約数の個数: 64

約数和(自身を含む): 48153600

約数和(自身を除く): 26438445

約数列:

[1, 3, 5, 7, 9, 11, 15, 21, 27, 33, 35, 45, 55, 63, 77, 99, 105, 135, 165, 189, 231, 297, 315, 385, 495, 693, 945, 1155, 1485, 2079, 2089, 3465, 6267, 10395, 10445, 14623, 18801, 22979, 31335, 43869, 56403, 68937, 73115, 94005, 114895, 131607, 160853, 206811, 219345, 282015, 344685, 394821, 482559, 620433, 658035, 804265, 1034055, 1447677, 1974105, 2412795, 3102165, 4343031, 7238385, 21715155]

約数ペア:

[(1, 21715155), (3, 7238385), (5, 4343031), (7, 3102165), (9, 2412795), (11, 1974105), (15, 1447677), (21, 1034055), (27, 804265), (33, 658035), (35, 620433), (45, 482559), (55, 394821), (63, 344685), (77, 282015), (99, 219345), (105, 206811), (135, 160853), (165, 131607), (189, 114895), (231, 94005), (297, 73115), (315, 68937), (385, 56403), (495, 43869), (693, 31335), (945, 22979), (1155, 18801), (1485, 14623), (2079, 10445), (2089, 10395), (3465, 6267)]