21021728

素因数分解:

$2^5\times 7^1\times {\mathrm{13}}^1\times {\mathrm{7219}}^1$

素因数の和:7249

約数の個数: 48

約数和(自身を含む): 50944320

約数和(自身を除く): 29922592

約数列:

[1, 2, 4, 7, 8, 13, 14, 16, 26, 28, 32, 52, 56, 91, 104, 112, 182, 208, 224, 364, 416, 728, 1456, 2912, 7219, 14438, 28876, 50533, 57752, 93847, 101066, 115504, 187694, 202132, 231008, 375388, 404264, 656929, 750776, 808528, 1313858, 1501552, 1617056, 2627716, 3003104, 5255432, 10510864, 21021728]

約数ペア:

[(1, 21021728), (2, 10510864), (4, 5255432), (7, 3003104), (8, 2627716), (13, 1617056), (14, 1501552), (16, 1313858), (26, 808528), (28, 750776), (32, 656929), (52, 404264), (56, 375388), (91, 231008), (104, 202132), (112, 187694), (182, 115504), (208, 101066), (224, 93847), (364, 57752), (416, 50533), (728, 28876), (1456, 14438), (2912, 7219)]