17979280

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{20431}}^1$

素因数の和:20455

約数の個数: 40

約数和(自身を含む): 45604224

約数和(自身を除く): 27624944

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 176, 220, 440, 880, 20431, 40862, 81724, 102155, 163448, 204310, 224741, 326896, 408620, 449482, 817240, 898964, 1123705, 1634480, 1797928, 2247410, 3595856, 4494820, 8989640, 17979280]

約数ペア:

[(1, 17979280), (2, 8989640), (4, 4494820), (5, 3595856), (8, 2247410), (10, 1797928), (11, 1634480), (16, 1123705), (20, 898964), (22, 817240), (40, 449482), (44, 408620), (55, 326896), (80, 224741), (88, 204310), (110, 163448), (176, 102155), (220, 81724), (440, 40862), (880, 20431)]