21752115

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{509}}^1$

素因数の和:572

約数の個数: 64

約数和(自身を含む): 44651520

約数和(自身を除く): 22899405

約数列:

[1, 3, 5, 7, 11, 15, 21, 33, 35, 37, 55, 77, 105, 111, 165, 185, 231, 259, 385, 407, 509, 555, 777, 1155, 1221, 1295, 1527, 2035, 2545, 2849, 3563, 3885, 5599, 6105, 7635, 8547, 10689, 14245, 16797, 17815, 18833, 27995, 39193, 42735, 53445, 56499, 83985, 94165, 117579, 131831, 195965, 207163, 282495, 395493, 587895, 621489, 659155, 1035815, 1450141, 1977465, 3107445, 4350423, 7250705, 21752115]

約数ペア:

[(1, 21752115), (3, 7250705), (5, 4350423), (7, 3107445), (11, 1977465), (15, 1450141), (21, 1035815), (33, 659155), (35, 621489), (37, 587895), (55, 395493), (77, 282495), (105, 207163), (111, 195965), (165, 131831), (185, 117579), (231, 94165), (259, 83985), (385, 56499), (407, 53445), (509, 42735), (555, 39193), (777, 27995), (1155, 18833), (1221, 17815), (1295, 16797), (1527, 14245), (2035, 10689), (2545, 8547), (2849, 7635), (3563, 6105), (3885, 5599)]