21210075

素因数分解:

$3^2\times 5^2\times {\mathrm{107}}^1\times {\mathrm{881}}^1$

素因数の和:1004

約数の個数: 36

約数和(自身を含む): 38388168

約数和(自身を除く): 17178093

約数列:

[1, 3, 5, 9, 15, 25, 45, 75, 107, 225, 321, 535, 881, 963, 1605, 2643, 2675, 4405, 4815, 7929, 8025, 13215, 22025, 24075, 39645, 66075, 94267, 198225, 282801, 471335, 848403, 1414005, 2356675, 4242015, 7070025, 21210075]

約数ペア:

[(1, 21210075), (3, 7070025), (5, 4242015), (9, 2356675), (15, 1414005), (25, 848403), (45, 471335), (75, 282801), (107, 198225), (225, 94267), (321, 66075), (535, 39645), (881, 24075), (963, 22025), (1605, 13215), (2643, 8025), (2675, 7929), (4405, 4815)]