21381152

素因数分解:

$2^5\times {\mathrm{13}}^1\times {\mathrm{103}}^1\times {\mathrm{499}}^1$

素因数の和:625

約数の個数: 48

約数和(自身を含む): 45864000

約数和(自身を除く): 24482848

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 52, 103, 104, 206, 208, 412, 416, 499, 824, 998, 1339, 1648, 1996, 2678, 3296, 3992, 5356, 6487, 7984, 10712, 12974, 15968, 21424, 25948, 42848, 51397, 51896, 102794, 103792, 205588, 207584, 411176, 668161, 822352, 1336322, 1644704, 2672644, 5345288, 10690576, 21381152]

約数ペア:

[(1, 21381152), (2, 10690576), (4, 5345288), (8, 2672644), (13, 1644704), (16, 1336322), (26, 822352), (32, 668161), (52, 411176), (103, 207584), (104, 205588), (206, 103792), (208, 102794), (412, 51896), (416, 51397), (499, 42848), (824, 25948), (998, 21424), (1339, 15968), (1648, 12974), (1996, 10712), (2678, 7984), (3296, 6487), (3992, 5356)]