21041685

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{67}}^1\times {\mathrm{997}}^1$

素因数の和:1082

約数の個数: 48

約数和(自身を含む): 42347136

約数和(自身を除く): 21305451

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 67, 105, 201, 315, 335, 469, 603, 997, 1005, 1407, 2345, 2991, 3015, 4221, 4985, 6979, 7035, 8973, 14955, 20937, 21105, 34895, 44865, 62811, 66799, 104685, 200397, 314055, 333995, 467593, 601191, 1001985, 1402779, 2337965, 3005955, 4208337, 7013895, 21041685]

約数ペア:

[(1, 21041685), (3, 7013895), (5, 4208337), (7, 3005955), (9, 2337965), (15, 1402779), (21, 1001985), (35, 601191), (45, 467593), (63, 333995), (67, 314055), (105, 200397), (201, 104685), (315, 66799), (335, 62811), (469, 44865), (603, 34895), (997, 21105), (1005, 20937), (1407, 14955), (2345, 8973), (2991, 7035), (3015, 6979), (4221, 4985)]