12939280

素因数分解:

$2^4\times 5^1\times {\mathrm{161741}}^1$

素因数の和:161754

約数の個数: 20

約数和(自身を含む): 30084012

約数和(自身を除く): 17144732

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 161741, 323482, 646964, 808705, 1293928, 1617410, 2587856, 3234820, 6469640, 12939280]

約数ペア:

[(1, 12939280), (2, 6469640), (4, 3234820), (5, 2587856), (8, 1617410), (10, 1293928), (16, 808705), (20, 646964), (40, 323482), (80, 161741)]