21055360

素因数分解:

$2^7\times 5^1\times {\mathrm{167}}^1\times {\mathrm{197}}^1$

素因数の和:383

約数の個数: 64

約数和(自身を含む): 50893920

約数和(自身を除く): 29838560

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 167, 197, 320, 334, 394, 640, 668, 788, 835, 985, 1336, 1576, 1670, 1970, 2672, 3152, 3340, 3940, 5344, 6304, 6680, 7880, 10688, 12608, 13360, 15760, 21376, 25216, 26720, 31520, 32899, 53440, 63040, 65798, 106880, 126080, 131596, 164495, 263192, 328990, 526384, 657980, 1052768, 1315960, 2105536, 2631920, 4211072, 5263840, 10527680, 21055360]

約数ペア:

[(1, 21055360), (2, 10527680), (4, 5263840), (5, 4211072), (8, 2631920), (10, 2105536), (16, 1315960), (20, 1052768), (32, 657980), (40, 526384), (64, 328990), (80, 263192), (128, 164495), (160, 131596), (167, 126080), (197, 106880), (320, 65798), (334, 63040), (394, 53440), (640, 32899), (668, 31520), (788, 26720), (835, 25216), (985, 21376), (1336, 15760), (1576, 13360), (1670, 12608), (1970, 10688), (2672, 7880), (3152, 6680), (3340, 6304), (3940, 5344)]