21820288

素因数分解:

$2^7\times 7^4\times {\mathrm{71}}^1$

素因数の和:113

約数の個数: 80

約数和(自身を含む): 51426360

約数和(自身を除く): 29606072

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 32, 49, 56, 64, 71, 98, 112, 128, 142, 196, 224, 284, 343, 392, 448, 497, 568, 686, 784, 896, 994, 1136, 1372, 1568, 1988, 2272, 2401, 2744, 3136, 3479, 3976, 4544, 4802, 5488, 6272, 6958, 7952, 9088, 9604, 10976, 13916, 15904, 19208, 21952, 24353, 27832, 31808, 38416, 43904, 48706, 55664, 63616, 76832, 97412, 111328, 153664, 170471, 194824, 222656, 307328, 340942, 389648, 445312, 681884, 779296, 1363768, 1558592, 2727536, 3117184, 5455072, 10910144, 21820288]

約数ペア:

[(1, 21820288), (2, 10910144), (4, 5455072), (7, 3117184), (8, 2727536), (14, 1558592), (16, 1363768), (28, 779296), (32, 681884), (49, 445312), (56, 389648), (64, 340942), (71, 307328), (98, 222656), (112, 194824), (128, 170471), (142, 153664), (196, 111328), (224, 97412), (284, 76832), (343, 63616), (392, 55664), (448, 48706), (497, 43904), (568, 38416), (686, 31808), (784, 27832), (896, 24353), (994, 21952), (1136, 19208), (1372, 15904), (1568, 13916), (1988, 10976), (2272, 9604), (2401, 9088), (2744, 7952), (3136, 6958), (3479, 6272), (3976, 5488), (4544, 4802)]