21387795

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^3\times {\mathrm{59}}^1$

素因数の和:117

約数の個数: 64

約数和(自身を含む): 41126400

約数和(自身を除く): 19738605

約数列:

[1, 3, 5, 11, 13, 15, 33, 39, 55, 59, 65, 143, 165, 169, 177, 195, 295, 429, 507, 649, 715, 767, 845, 885, 1859, 1947, 2145, 2197, 2301, 2535, 3245, 3835, 5577, 6591, 8437, 9295, 9735, 9971, 10985, 11505, 24167, 25311, 27885, 29913, 32955, 42185, 49855, 72501, 109681, 120835, 126555, 129623, 149565, 329043, 362505, 388869, 548405, 648115, 1425853, 1645215, 1944345, 4277559, 7129265, 21387795]

約数ペア:

[(1, 21387795), (3, 7129265), (5, 4277559), (11, 1944345), (13, 1645215), (15, 1425853), (33, 648115), (39, 548405), (55, 388869), (59, 362505), (65, 329043), (143, 149565), (165, 129623), (169, 126555), (177, 120835), (195, 109681), (295, 72501), (429, 49855), (507, 42185), (649, 32955), (715, 29913), (767, 27885), (845, 25311), (885, 24167), (1859, 11505), (1947, 10985), (2145, 9971), (2197, 9735), (2301, 9295), (2535, 8437), (3245, 6591), (3835, 5577)]