28251993

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{157}}^1$

素因数の和:238

約数の個数: 64

約数和(自身を含む): 50964480

約数和(自身を除く): 22712487

約数列:

[1, 3, 7, 11, 19, 21, 33, 41, 57, 77, 123, 133, 157, 209, 231, 287, 399, 451, 471, 627, 779, 861, 1099, 1353, 1463, 1727, 2337, 2983, 3157, 3297, 4389, 5181, 5453, 6437, 8569, 8949, 9471, 12089, 16359, 19311, 20881, 25707, 32813, 36267, 45059, 59983, 62643, 70807, 98439, 122303, 135177, 179949, 212421, 229691, 366909, 495649, 689073, 856121, 1345333, 1486947, 2568363, 4035999, 9417331, 28251993]

約数ペア:

[(1, 28251993), (3, 9417331), (7, 4035999), (11, 2568363), (19, 1486947), (21, 1345333), (33, 856121), (41, 689073), (57, 495649), (77, 366909), (123, 229691), (133, 212421), (157, 179949), (209, 135177), (231, 122303), (287, 98439), (399, 70807), (451, 62643), (471, 59983), (627, 45059), (779, 36267), (861, 32813), (1099, 25707), (1353, 20881), (1463, 19311), (1727, 16359), (2337, 12089), (2983, 9471), (3157, 8949), (3297, 8569), (4389, 6437), (5181, 5453)]