686980

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{701}}^1$

素因数の和:724

約数の個数: 36

約数和(自身を含む): 1680588

約数和(自身を除く): 993608

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 701, 980, 1402, 2804, 3505, 4907, 7010, 9814, 14020, 19628, 24535, 34349, 49070, 68698, 98140, 137396, 171745, 343490, 686980]

約数ペア:

[(1, 686980), (2, 343490), (4, 171745), (5, 137396), (7, 98140), (10, 68698), (14, 49070), (20, 34349), (28, 24535), (35, 19628), (49, 14020), (70, 9814), (98, 7010), (140, 4907), (196, 3505), (245, 2804), (490, 1402), (701, 980)]