20478964

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{313}}^1\times {\mathrm{1487}}^1$

素因数の和:1815

約数の個数: 24

約数和(自身を含む): 39247488

約数和(自身を除く): 18768524

約数列:

[1, 2, 4, 11, 22, 44, 313, 626, 1252, 1487, 2974, 3443, 5948, 6886, 13772, 16357, 32714, 65428, 465431, 930862, 1861724, 5119741, 10239482, 20478964]

約数ペア:

[(1, 20478964), (2, 10239482), (4, 5119741), (11, 1861724), (22, 930862), (44, 465431), (313, 65428), (626, 32714), (1252, 16357), (1487, 13772), (2974, 6886), (3443, 5948)]