21457264

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{78887}}^1$

素因数の和:78912

約数の個数: 20

約数和(自身を含む): 44019504

約数和(自身を除く): 22562240

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 272, 78887, 157774, 315548, 631096, 1262192, 1341079, 2682158, 5364316, 10728632, 21457264]

約数ペア:

[(1, 21457264), (2, 10728632), (4, 5364316), (8, 2682158), (16, 1341079), (17, 1262192), (34, 631096), (68, 315548), (136, 157774), (272, 78887)]