20881216

素因数分解:

$2^6\times {\mathrm{509}}^1\times {\mathrm{641}}^1$

素因数の和:1162

約数の個数: 28

約数和(自身を含む): 41582340

約数和(自身を除く): 20701124

約数列:

[1, 2, 4, 8, 16, 32, 64, 509, 641, 1018, 1282, 2036, 2564, 4072, 5128, 8144, 10256, 16288, 20512, 32576, 41024, 326269, 652538, 1305076, 2610152, 5220304, 10440608, 20881216]

約数ペア:

[(1, 20881216), (2, 10440608), (4, 5220304), (8, 2610152), (16, 1305076), (32, 652538), (64, 326269), (509, 41024), (641, 32576), (1018, 20512), (1282, 16288), (2036, 10256), (2564, 8144), (4072, 5128)]