638522980

素因数分解:

$2^2\times 5^1\times {\mathrm{127}}^1\times {\mathrm{251387}}^1$

素因数の和:251523

約数の個数: 24

約数和(自身を含む): 1351461888

約数和(自身を除く): 712938908

約数列:

[1, 2, 4, 5, 10, 20, 127, 254, 508, 635, 1270, 2540, 251387, 502774, 1005548, 1256935, 2513870, 5027740, 31926149, 63852298, 127704596, 159630745, 319261490, 638522980]

約数ペア:

[(1, 638522980), (2, 319261490), (4, 159630745), (5, 127704596), (10, 63852298), (20, 31926149), (127, 5027740), (254, 2513870), (508, 1256935), (635, 1005548), (1270, 502774), (2540, 251387)]