21208516

素因数分解:

$2^2\times 7^1\times {\mathrm{683}}^1\times {\mathrm{1109}}^1$

素因数の和:1803

約数の個数: 24

約数和(自身を含む): 42517440

約数和(自身を除く): 21308924

約数列:

[1, 2, 4, 7, 14, 28, 683, 1109, 1366, 2218, 2732, 4436, 4781, 7763, 9562, 15526, 19124, 31052, 757447, 1514894, 3029788, 5302129, 10604258, 21208516]

約数ペア:

[(1, 21208516), (2, 10604258), (4, 5302129), (7, 3029788), (14, 1514894), (28, 757447), (683, 31052), (1109, 19124), (1366, 15526), (2218, 9562), (2732, 7763), (4436, 4781)]