20678384

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{251}}^1\times {\mathrm{271}}^1$

素因数の和:549

約数の個数: 40

約数和(自身を含む): 42497280

約数和(自身を除く): 21818896

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 152, 251, 271, 304, 502, 542, 1004, 1084, 2008, 2168, 4016, 4336, 4769, 5149, 9538, 10298, 19076, 20596, 38152, 41192, 68021, 76304, 82384, 136042, 272084, 544168, 1088336, 1292399, 2584798, 5169596, 10339192, 20678384]

約数ペア:

[(1, 20678384), (2, 10339192), (4, 5169596), (8, 2584798), (16, 1292399), (19, 1088336), (38, 544168), (76, 272084), (152, 136042), (251, 82384), (271, 76304), (304, 68021), (502, 41192), (542, 38152), (1004, 20596), (1084, 19076), (2008, 10298), (2168, 9538), (4016, 5149), (4336, 4769)]