21263648

素因数分解:

$2^5\times 7^2\times {\mathrm{71}}^1\times {\mathrm{191}}^1$

素因数の和:286

約数の個数: 72

約数和(自身を含む): 49641984

約数和(自身を除く): 28378336

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 32, 49, 56, 71, 98, 112, 142, 191, 196, 224, 284, 382, 392, 497, 568, 764, 784, 994, 1136, 1337, 1528, 1568, 1988, 2272, 2674, 3056, 3479, 3976, 5348, 6112, 6958, 7952, 9359, 10696, 13561, 13916, 15904, 18718, 21392, 27122, 27832, 37436, 42784, 54244, 55664, 74872, 94927, 108488, 111328, 149744, 189854, 216976, 299488, 379708, 433952, 664489, 759416, 1328978, 1518832, 2657956, 3037664, 5315912, 10631824, 21263648]

約数ペア:

[(1, 21263648), (2, 10631824), (4, 5315912), (7, 3037664), (8, 2657956), (14, 1518832), (16, 1328978), (28, 759416), (32, 664489), (49, 433952), (56, 379708), (71, 299488), (98, 216976), (112, 189854), (142, 149744), (191, 111328), (196, 108488), (224, 94927), (284, 74872), (382, 55664), (392, 54244), (497, 42784), (568, 37436), (764, 27832), (784, 27122), (994, 21392), (1136, 18718), (1337, 15904), (1528, 13916), (1568, 13561), (1988, 10696), (2272, 9359), (2674, 7952), (3056, 6958), (3479, 6112), (3976, 5348)]