687831290

素因数分解:

$2^1\times 5^1\times {\mathrm{401}}^1\times {\mathrm{171529}}^1$

素因数の和:171937

約数の個数: 16

約数和(自身を含む): 1241191080

約数和(自身を除く): 553359790

約数列:

[1, 2, 5, 10, 401, 802, 2005, 4010, 171529, 343058, 857645, 1715290, 68783129, 137566258, 343915645, 687831290]

約数ペア:

[(1, 687831290), (2, 343915645), (5, 137566258), (10, 68783129), (401, 1715290), (802, 857645), (2005, 343058), (4010, 171529)]