21040245

素因数分解:

$3^2\times 5^1\times {\mathrm{307}}^1\times {\mathrm{1523}}^1$

素因数の和:1841

約数の個数: 24

約数和(自身を含む): 36612576

約数和(自身を除く): 15572331

約数列:

[1, 3, 5, 9, 15, 45, 307, 921, 1523, 1535, 2763, 4569, 4605, 7615, 13707, 13815, 22845, 68535, 467561, 1402683, 2337805, 4208049, 7013415, 21040245]

約数ペア:

[(1, 21040245), (3, 7013415), (5, 4208049), (9, 2337805), (15, 1402683), (45, 467561), (307, 68535), (921, 22845), (1523, 13815), (1535, 13707), (2763, 7615), (4569, 4605)]