21510117

素因数分解:

$3^5\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{127}}^1$

素因数の和:200

約数の個数: 48

約数和(自身を含む): 35223552

約数和(自身を除く): 13713435

約数列:

[1, 3, 9, 17, 27, 41, 51, 81, 123, 127, 153, 243, 369, 381, 459, 697, 1107, 1143, 1377, 2091, 2159, 3321, 3429, 4131, 5207, 6273, 6477, 9963, 10287, 15621, 18819, 19431, 30861, 46863, 56457, 58293, 88519, 140589, 169371, 174879, 265557, 421767, 524637, 796671, 1265301, 2390013, 7170039, 21510117]

約数ペア:

[(1, 21510117), (3, 7170039), (9, 2390013), (17, 1265301), (27, 796671), (41, 524637), (51, 421767), (81, 265557), (123, 174879), (127, 169371), (153, 140589), (243, 88519), (369, 58293), (381, 56457), (459, 46863), (697, 30861), (1107, 19431), (1143, 18819), (1377, 15621), (2091, 10287), (2159, 9963), (3321, 6477), (3429, 6273), (4131, 5207)]