257832380

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{991663}}^1$

素因数の和:991685

約数の個数: 24

約数和(自身を含む): 583098432

約数和(自身を除く): 325266052

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 991663, 1983326, 3966652, 4958315, 9916630, 12891619, 19833260, 25783238, 51566476, 64458095, 128916190, 257832380]

約数ペア:

[(1, 257832380), (2, 128916190), (4, 64458095), (5, 51566476), (10, 25783238), (13, 19833260), (20, 12891619), (26, 9916630), (52, 4958315), (65, 3966652), (130, 1983326), (260, 991663)]