21893795

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{73}}^1$

素因数の和:156

約数の個数: 64

約数和(自身を含む): 35804160

約数和(自身を除く): 13910365

約数列:

[1, 5, 7, 11, 19, 35, 41, 55, 73, 77, 95, 133, 205, 209, 287, 365, 385, 451, 511, 665, 779, 803, 1045, 1387, 1435, 1463, 2255, 2555, 2993, 3157, 3895, 4015, 5453, 5621, 6935, 7315, 8569, 9709, 14965, 15257, 15785, 20951, 27265, 28105, 32923, 42845, 48545, 56867, 59983, 76285, 104755, 106799, 164615, 230461, 284335, 299915, 398069, 533995, 625537, 1152305, 1990345, 3127685, 4378759, 21893795]

約数ペア:

[(1, 21893795), (5, 4378759), (7, 3127685), (11, 1990345), (19, 1152305), (35, 625537), (41, 533995), (55, 398069), (73, 299915), (77, 284335), (95, 230461), (133, 164615), (205, 106799), (209, 104755), (287, 76285), (365, 59983), (385, 56867), (451, 48545), (511, 42845), (665, 32923), (779, 28105), (803, 27265), (1045, 20951), (1387, 15785), (1435, 15257), (1463, 14965), (2255, 9709), (2555, 8569), (2993, 7315), (3157, 6935), (3895, 5621), (4015, 5453)]