21249005

素因数分解:

$5^1\times {\mathrm{109}}^1\times {\mathrm{127}}^1\times {\mathrm{307}}^1$

素因数の和:548

約数の個数: 16

約数和(自身を含む): 26019840

約数和(自身を除く): 4770835

約数列:

[1, 5, 109, 127, 307, 545, 635, 1535, 13843, 33463, 38989, 69215, 167315, 194945, 4249801, 21249005]

約数ペア:

[(1, 21249005), (5, 4249801), (109, 194945), (127, 167315), (307, 69215), (545, 38989), (635, 33463), (1535, 13843)]