21287110

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{373}}^1\times {\mathrm{439}}^1$

素因数の和:832

約数の個数: 32

約数和(自身を含む): 41469120

約数和(自身を除く): 20182010

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 373, 439, 746, 878, 1865, 2195, 3730, 4390, 4849, 5707, 9698, 11414, 24245, 28535, 48490, 57070, 163747, 327494, 818735, 1637470, 2128711, 4257422, 10643555, 21287110]

約数ペア:

[(1, 21287110), (2, 10643555), (5, 4257422), (10, 2128711), (13, 1637470), (26, 818735), (65, 327494), (130, 163747), (373, 57070), (439, 48490), (746, 28535), (878, 24245), (1865, 11414), (2195, 9698), (3730, 5707), (4390, 4849)]