21162920

素因数分解:

$2^3\times 5^1\times {\mathrm{317}}^1\times {\mathrm{1669}}^1$

素因数の和:1997

約数の個数: 32

約数和(自身を含む): 47795400

約数和(自身を除く): 26632480

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 317, 634, 1268, 1585, 1669, 2536, 3170, 3338, 6340, 6676, 8345, 12680, 13352, 16690, 33380, 66760, 529073, 1058146, 2116292, 2645365, 4232584, 5290730, 10581460, 21162920]

約数ペア:

[(1, 21162920), (2, 10581460), (4, 5290730), (5, 4232584), (8, 2645365), (10, 2116292), (20, 1058146), (40, 529073), (317, 66760), (634, 33380), (1268, 16690), (1585, 13352), (1669, 12680), (2536, 8345), (3170, 6676), (3338, 6340)]