21348496

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{197}}^1\times {\mathrm{521}}^1$

素因数の和:739

約数の個数: 40

約数和(自身を含む): 44856504

約数和(自身を除く): 23508008

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 197, 208, 394, 521, 788, 1042, 1576, 2084, 2561, 3152, 4168, 5122, 6773, 8336, 10244, 13546, 20488, 27092, 40976, 54184, 102637, 108368, 205274, 410548, 821096, 1334281, 1642192, 2668562, 5337124, 10674248, 21348496]

約数ペア:

[(1, 21348496), (2, 10674248), (4, 5337124), (8, 2668562), (13, 1642192), (16, 1334281), (26, 821096), (52, 410548), (104, 205274), (197, 108368), (208, 102637), (394, 54184), (521, 40976), (788, 27092), (1042, 20488), (1576, 13546), (2084, 10244), (2561, 8336), (3152, 6773), (4168, 5122)]