80644000

素因数分解:

$2^5\times 5^3\times {\mathrm{20161}}^1$

素因数の和:20186

約数の個数: 48

約数和(自身を含む): 198152136

約数和(自身を除く): 117508136

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 125, 160, 200, 250, 400, 500, 800, 1000, 2000, 4000, 20161, 40322, 80644, 100805, 161288, 201610, 322576, 403220, 504025, 645152, 806440, 1008050, 1612880, 2016100, 2520125, 3225760, 4032200, 5040250, 8064400, 10080500, 16128800, 20161000, 40322000, 80644000]

約数ペア:

[(1, 80644000), (2, 40322000), (4, 20161000), (5, 16128800), (8, 10080500), (10, 8064400), (16, 5040250), (20, 4032200), (25, 3225760), (32, 2520125), (40, 2016100), (50, 1612880), (80, 1008050), (100, 806440), (125, 645152), (160, 504025), (200, 403220), (250, 322576), (400, 201610), (500, 161288), (800, 100805), (1000, 80644), (2000, 40322), (4000, 20161)]