20121475

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{3851}}^1$

素因数の和:3891

約数の個数: 24

約数和(自身を含む): 28658880

約数和(自身を除く): 8537405

約数列:

[1, 5, 11, 19, 25, 55, 95, 209, 275, 475, 1045, 3851, 5225, 19255, 42361, 73169, 96275, 211805, 365845, 804859, 1059025, 1829225, 4024295, 20121475]

約数ペア:

[(1, 20121475), (5, 4024295), (11, 1829225), (19, 1059025), (25, 804859), (55, 365845), (95, 211805), (209, 96275), (275, 73169), (475, 42361), (1045, 19255), (3851, 5225)]