21489405

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{103}}^1\times {\mathrm{1987}}^1$

素因数の和:2105

約数の個数: 32

約数和(自身を含む): 39696384

約数和(自身を除く): 18206979

約数列:

[1, 3, 5, 7, 15, 21, 35, 103, 105, 309, 515, 721, 1545, 1987, 2163, 3605, 5961, 9935, 10815, 13909, 29805, 41727, 69545, 204661, 208635, 613983, 1023305, 1432627, 3069915, 4297881, 7163135, 21489405]

約数ペア:

[(1, 21489405), (3, 7163135), (5, 4297881), (7, 3069915), (15, 1432627), (21, 1023305), (35, 613983), (103, 208635), (105, 204661), (309, 69545), (515, 41727), (721, 29805), (1545, 13909), (1987, 10815), (2163, 9935), (3605, 5961)]