20012561275

素因数分解:

$5^2\times 7^1\times {\mathrm{61}}^2\times {\mathrm{73}}^1\times {\mathrm{421}}^1$

素因数の和:633

約数の個数: 72

約数和(自身を含む): 29297609952

約数和(自身を除く): 9285048677

約数列:

[1, 5, 7, 25, 35, 61, 73, 175, 305, 365, 421, 427, 511, 1525, 1825, 2105, 2135, 2555, 2947, 3721, 4453, 10525, 10675, 12775, 14735, 18605, 22265, 25681, 26047, 30733, 31171, 73675, 93025, 111325, 128405, 130235, 153665, 155855, 179767, 215131, 271633, 642025, 651175, 768325, 779275, 898835, 1075655, 1358165, 1566541, 1874713, 1901431, 4494175, 5378275, 6790825, 7832705, 9373565, 9507155, 10965787, 13122991, 39163525, 46867825, 47535775, 54828935, 65614955, 114357493, 274144675, 328074775, 571787465, 800502451, 2858937325, 4002512255, 20012561275]

約数ペア:

[(1, 20012561275), (5, 4002512255), (7, 2858937325), (25, 800502451), (35, 571787465), (61, 328074775), (73, 274144675), (175, 114357493), (305, 65614955), (365, 54828935), (421, 47535775), (427, 46867825), (511, 39163525), (1525, 13122991), (1825, 10965787), (2105, 9507155), (2135, 9373565), (2555, 7832705), (2947, 6790825), (3721, 5378275), (4453, 4494175), (10525, 1901431), (10675, 1874713), (12775, 1566541), (14735, 1358165), (18605, 1075655), (22265, 898835), (25681, 779275), (26047, 768325), (30733, 651175), (31171, 642025), (73675, 271633), (93025, 215131), (111325, 179767), (128405, 155855), (130235, 153665)]