686440

素因数分解:

$2^3\times 5^1\times {\mathrm{131}}^2$

素因数の和:273

約数の個数: 24

約数和(自身を含む): 1556370

約数和(自身を除く): 869930

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 131, 262, 524, 655, 1048, 1310, 2620, 5240, 17161, 34322, 68644, 85805, 137288, 171610, 343220, 686440]

約数ペア:

[(1, 686440), (2, 343220), (4, 171610), (5, 137288), (8, 85805), (10, 68644), (20, 34322), (40, 17161), (131, 5240), (262, 2620), (524, 1310), (655, 1048)]