20340560

素因数分解:

$2^4\times 5^1\times {\mathrm{254257}}^1$

素因数の和:254270

約数の個数: 20

約数和(自身を含む): 47291988

約数和(自身を除く): 26951428

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 254257, 508514, 1017028, 1271285, 2034056, 2542570, 4068112, 5085140, 10170280, 20340560]

約数ペア:

[(1, 20340560), (2, 10170280), (4, 5085140), (5, 4068112), (8, 2542570), (10, 2034056), (16, 1271285), (20, 1017028), (40, 508514), (80, 254257)]