640276

素因数分解:

$2^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{1759}}^1$

素因数の和:1783

約数の個数: 24

約数和(自身を含む): 1379840

約数和(自身を除く): 739564

約数列:

[1, 2, 4, 7, 13, 14, 26, 28, 52, 91, 182, 364, 1759, 3518, 7036, 12313, 22867, 24626, 45734, 49252, 91468, 160069, 320138, 640276]

約数ペア:

[(1, 640276), (2, 320138), (4, 160069), (7, 91468), (13, 49252), (14, 45734), (26, 24626), (28, 22867), (52, 12313), (91, 7036), (182, 3518), (364, 1759)]