209969180

素因数分解:

$2^2\times 5^1\times {\mathrm{1409}}^1\times {\mathrm{7451}}^1$

素因数の和:8869

約数の個数: 24

約数和(自身を含む): 441307440

約数和(自身を除く): 231338260

約数列:

[1, 2, 4, 5, 10, 20, 1409, 2818, 5636, 7045, 7451, 14090, 14902, 28180, 29804, 37255, 74510, 149020, 10498459, 20996918, 41993836, 52492295, 104984590, 209969180]

約数ペア:

[(1, 209969180), (2, 104984590), (4, 52492295), (5, 41993836), (10, 20996918), (20, 10498459), (1409, 149020), (2818, 74510), (5636, 37255), (7045, 29804), (7451, 28180), (14090, 14902)]