639804572

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{204803}}^1$

素因数の和:204889

約数の個数: 24

約数和(自身を含む): 1238654592

約数和(自身を除く): 598850020

約数列:

[1, 2, 4, 11, 22, 44, 71, 142, 284, 781, 1562, 3124, 204803, 409606, 819212, 2252833, 4505666, 9011332, 14541013, 29082026, 58164052, 159951143, 319902286, 639804572]

約数ペア:

[(1, 639804572), (2, 319902286), (4, 159951143), (11, 58164052), (22, 29082026), (44, 14541013), (71, 9011332), (142, 4505666), (284, 2252833), (781, 819212), (1562, 409606), (3124, 204803)]