20640744

素因数分解:

$2^3\times 3^4\times {\mathrm{53}}^1\times {\mathrm{601}}^1$

素因数の和:672

約数の個数: 80

約数和(自身を含む): 59002020

約数和(自身を除く): 38361276

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 27, 36, 53, 54, 72, 81, 106, 108, 159, 162, 212, 216, 318, 324, 424, 477, 601, 636, 648, 954, 1202, 1272, 1431, 1803, 1908, 2404, 2862, 3606, 3816, 4293, 4808, 5409, 5724, 7212, 8586, 10818, 11448, 14424, 16227, 17172, 21636, 31853, 32454, 34344, 43272, 48681, 63706, 64908, 95559, 97362, 127412, 129816, 191118, 194724, 254824, 286677, 382236, 389448, 573354, 764472, 860031, 1146708, 1720062, 2293416, 2580093, 3440124, 5160186, 6880248, 10320372, 20640744]

約数ペア:

[(1, 20640744), (2, 10320372), (3, 6880248), (4, 5160186), (6, 3440124), (8, 2580093), (9, 2293416), (12, 1720062), (18, 1146708), (24, 860031), (27, 764472), (36, 573354), (53, 389448), (54, 382236), (72, 286677), (81, 254824), (106, 194724), (108, 191118), (159, 129816), (162, 127412), (212, 97362), (216, 95559), (318, 64908), (324, 63706), (424, 48681), (477, 43272), (601, 34344), (636, 32454), (648, 31853), (954, 21636), (1202, 17172), (1272, 16227), (1431, 14424), (1803, 11448), (1908, 10818), (2404, 8586), (2862, 7212), (3606, 5724), (3816, 5409), (4293, 4808)]