19885960

素因数分解:

$2^3\times 5^1\times {\mathrm{109}}^1\times {\mathrm{4561}}^1$

素因数の和:4681

約数の個数: 32

約数和(自身を含む): 45163800

約数和(自身を除く): 25277840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 109, 218, 436, 545, 872, 1090, 2180, 4360, 4561, 9122, 18244, 22805, 36488, 45610, 91220, 182440, 497149, 994298, 1988596, 2485745, 3977192, 4971490, 9942980, 19885960]

約数ペア:

[(1, 19885960), (2, 9942980), (4, 4971490), (5, 3977192), (8, 2485745), (10, 1988596), (20, 994298), (40, 497149), (109, 182440), (218, 91220), (436, 45610), (545, 36488), (872, 22805), (1090, 18244), (2180, 9122), (4360, 4561)]