20868440

素因数分解:

$2^3\times 5^1\times {\mathrm{157}}^1\times {\mathrm{3323}}^1$

素因数の和:3491

約数の個数: 32

約数和(自身を含む): 47267280

約数和(自身を除く): 26398840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 157, 314, 628, 785, 1256, 1570, 3140, 3323, 6280, 6646, 13292, 16615, 26584, 33230, 66460, 132920, 521711, 1043422, 2086844, 2608555, 4173688, 5217110, 10434220, 20868440]

約数ペア:

[(1, 20868440), (2, 10434220), (4, 5217110), (5, 4173688), (8, 2608555), (10, 2086844), (20, 1043422), (40, 521711), (157, 132920), (314, 66460), (628, 33230), (785, 26584), (1256, 16615), (1570, 13292), (3140, 6646), (3323, 6280)]