21401384

素因数分解:

$2^3\times {\mathrm{83}}^1\times {\mathrm{167}}^1\times {\mathrm{193}}^1$

素因数の和:449

約数の個数: 32

約数和(自身を含む): 41065920

約数和(自身を除く): 19664536

約数列:

[1, 2, 4, 8, 83, 166, 167, 193, 332, 334, 386, 664, 668, 772, 1336, 1544, 13861, 16019, 27722, 32038, 32231, 55444, 64076, 64462, 110888, 128152, 128924, 257848, 2675173, 5350346, 10700692, 21401384]

約数ペア:

[(1, 21401384), (2, 10700692), (4, 5350346), (8, 2675173), (83, 257848), (166, 128924), (167, 128152), (193, 110888), (332, 64462), (334, 64076), (386, 55444), (664, 32231), (668, 32038), (772, 27722), (1336, 16019), (1544, 13861)]