21491912

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{197}}^1\times {\mathrm{1049}}^1$

素因数の和:1265

約数の個数: 32

約数和(自身を含む): 43659000

約数和(自身を除く): 22167088

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 197, 394, 788, 1049, 1576, 2098, 2561, 4196, 5122, 8392, 10244, 13637, 20488, 27274, 54548, 109096, 206653, 413306, 826612, 1653224, 2686489, 5372978, 10745956, 21491912]

約数ペア:

[(1, 21491912), (2, 10745956), (4, 5372978), (8, 2686489), (13, 1653224), (26, 826612), (52, 413306), (104, 206653), (197, 109096), (394, 54548), (788, 27274), (1049, 20488), (1576, 13637), (2098, 10244), (2561, 8392), (4196, 5122)]