21408688

素因数分解:

$2^4\times 7^3\times {\mathrm{47}}^1\times {\mathrm{83}}^1$

素因数の和:159

約数の個数: 80

約数和(自身を含む): 49996800

約数和(自身を除く): 28588112

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 47, 49, 56, 83, 94, 98, 112, 166, 188, 196, 329, 332, 343, 376, 392, 581, 658, 664, 686, 752, 784, 1162, 1316, 1328, 1372, 2303, 2324, 2632, 2744, 3901, 4067, 4606, 4648, 5264, 5488, 7802, 8134, 9212, 9296, 15604, 16121, 16268, 18424, 27307, 28469, 31208, 32242, 32536, 36848, 54614, 56938, 62416, 64484, 65072, 109228, 113876, 128968, 191149, 218456, 227752, 257936, 382298, 436912, 455504, 764596, 1338043, 1529192, 2676086, 3058384, 5352172, 10704344, 21408688]

約数ペア:

[(1, 21408688), (2, 10704344), (4, 5352172), (7, 3058384), (8, 2676086), (14, 1529192), (16, 1338043), (28, 764596), (47, 455504), (49, 436912), (56, 382298), (83, 257936), (94, 227752), (98, 218456), (112, 191149), (166, 128968), (188, 113876), (196, 109228), (329, 65072), (332, 64484), (343, 62416), (376, 56938), (392, 54614), (581, 36848), (658, 32536), (664, 32242), (686, 31208), (752, 28469), (784, 27307), (1162, 18424), (1316, 16268), (1328, 16121), (1372, 15604), (2303, 9296), (2324, 9212), (2632, 8134), (2744, 7802), (3901, 5488), (4067, 5264), (4606, 4648)]