21784304

素因数分解:

$2^4\times {\mathrm{109}}^1\times {\mathrm{12491}}^1$

素因数の和:12608

約数の個数: 20

約数和(自身を含む): 42597720

約数和(自身を除く): 20813416

約数列:

[1, 2, 4, 8, 16, 109, 218, 436, 872, 1744, 12491, 24982, 49964, 99928, 199856, 1361519, 2723038, 5446076, 10892152, 21784304]

約数ペア:

[(1, 21784304), (2, 10892152), (4, 5446076), (8, 2723038), (16, 1361519), (109, 199856), (218, 99928), (436, 49964), (872, 24982), (1744, 12491)]