21491204

素因数分解:

$2^2\times 7^2\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{199}}^1$

素因数の和:265

約数の個数: 72

約数和(自身を含む): 47880000

約数和(自身を除く): 26388796

約数列:

[1, 2, 4, 7, 14, 19, 28, 29, 38, 49, 58, 76, 98, 116, 133, 196, 199, 203, 266, 398, 406, 532, 551, 796, 812, 931, 1102, 1393, 1421, 1862, 2204, 2786, 2842, 3724, 3781, 3857, 5572, 5684, 5771, 7562, 7714, 9751, 11542, 15124, 15428, 19502, 23084, 26467, 26999, 39004, 40397, 52934, 53998, 80794, 105868, 107996, 109649, 161588, 185269, 219298, 282779, 370538, 438596, 565558, 741076, 767543, 1131116, 1535086, 3070172, 5372801, 10745602, 21491204]

約数ペア:

[(1, 21491204), (2, 10745602), (4, 5372801), (7, 3070172), (14, 1535086), (19, 1131116), (28, 767543), (29, 741076), (38, 565558), (49, 438596), (58, 370538), (76, 282779), (98, 219298), (116, 185269), (133, 161588), (196, 109649), (199, 107996), (203, 105868), (266, 80794), (398, 53998), (406, 52934), (532, 40397), (551, 39004), (796, 26999), (812, 26467), (931, 23084), (1102, 19502), (1393, 15428), (1421, 15124), (1862, 11542), (2204, 9751), (2786, 7714), (2842, 7562), (3724, 5771), (3781, 5684), (3857, 5572)]