81412720

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^2\times {\mathrm{2819}}^1$

素因数の和:2870

約数の個数: 60

約数和(自身を含む): 199842120

約数和(自身を除く): 118429400

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 190, 304, 361, 380, 722, 760, 1444, 1520, 1805, 2819, 2888, 3610, 5638, 5776, 7220, 11276, 14095, 14440, 22552, 28190, 28880, 45104, 53561, 56380, 107122, 112760, 214244, 225520, 267805, 428488, 535610, 856976, 1017659, 1071220, 2035318, 2142440, 4070636, 4284880, 5088295, 8141272, 10176590, 16282544, 20353180, 40706360, 81412720]

約数ペア:

[(1, 81412720), (2, 40706360), (4, 20353180), (5, 16282544), (8, 10176590), (10, 8141272), (16, 5088295), (19, 4284880), (20, 4070636), (38, 2142440), (40, 2035318), (76, 1071220), (80, 1017659), (95, 856976), (152, 535610), (190, 428488), (304, 267805), (361, 225520), (380, 214244), (722, 112760), (760, 107122), (1444, 56380), (1520, 53561), (1805, 45104), (2819, 28880), (2888, 28190), (3610, 22552), (5638, 14440), (5776, 14095), (7220, 11276)]