21420704

素因数分解:

$2^5\times {\mathrm{67}}^1\times {\mathrm{97}}^1\times {\mathrm{103}}^1$

素因数の和:277

約数の個数: 48

約数和(自身を含む): 43662528

約数和(自身を除く): 22241824

約数列:

[1, 2, 4, 8, 16, 32, 67, 97, 103, 134, 194, 206, 268, 388, 412, 536, 776, 824, 1072, 1552, 1648, 2144, 3104, 3296, 6499, 6901, 9991, 12998, 13802, 19982, 25996, 27604, 39964, 51992, 55208, 79928, 103984, 110416, 159856, 207968, 220832, 319712, 669397, 1338794, 2677588, 5355176, 10710352, 21420704]

約数ペア:

[(1, 21420704), (2, 10710352), (4, 5355176), (8, 2677588), (16, 1338794), (32, 669397), (67, 319712), (97, 220832), (103, 207968), (134, 159856), (194, 110416), (206, 103984), (268, 79928), (388, 55208), (412, 51992), (536, 39964), (776, 27604), (824, 25996), (1072, 19982), (1552, 13802), (1648, 12998), (2144, 9991), (3104, 6901), (3296, 6499)]