21565089

素因数分解:

$3^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{131}}^1$

素因数の和:227

約数の個数: 64

約数和(自身を含む): 40212480

約数和(自身を除く): 18647391

約数列:

[1, 3, 7, 9, 13, 21, 27, 39, 63, 67, 91, 117, 131, 189, 201, 273, 351, 393, 469, 603, 819, 871, 917, 1179, 1407, 1703, 1809, 2457, 2613, 2751, 3537, 4221, 5109, 6097, 7839, 8253, 8777, 11921, 12663, 15327, 18291, 23517, 24759, 26331, 35763, 45981, 54873, 61439, 78993, 107289, 114101, 164619, 184317, 236979, 321867, 342303, 552951, 798707, 1026909, 1658853, 2396121, 3080727, 7188363, 21565089]

約数ペア:

[(1, 21565089), (3, 7188363), (7, 3080727), (9, 2396121), (13, 1658853), (21, 1026909), (27, 798707), (39, 552951), (63, 342303), (67, 321867), (91, 236979), (117, 184317), (131, 164619), (189, 114101), (201, 107289), (273, 78993), (351, 61439), (393, 54873), (469, 45981), (603, 35763), (819, 26331), (871, 24759), (917, 23517), (1179, 18291), (1407, 15327), (1703, 12663), (1809, 11921), (2457, 8777), (2613, 8253), (2751, 7839), (3537, 6097), (4221, 5109)]