21380265

素因数分解:

$3^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{12841}}^1$

素因数の和:12889

約数の個数: 24

約数和(自身を含む): 38063688

約数和(自身を除く): 16683423

約数列:

[1, 3, 5, 9, 15, 37, 45, 111, 185, 333, 555, 1665, 12841, 38523, 64205, 115569, 192615, 475117, 577845, 1425351, 2375585, 4276053, 7126755, 21380265]

約数ペア:

[(1, 21380265), (3, 7126755), (5, 4276053), (9, 2375585), (15, 1425351), (37, 577845), (45, 475117), (111, 192615), (185, 115569), (333, 64205), (555, 38523), (1665, 12841)]