21661805

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^2\times {\mathrm{1091}}^1$

素因数の和:1145

約数の個数: 24

約数和(自身を含む): 29955744

約数和(自身を除く): 8293939

約数列:

[1, 5, 11, 19, 55, 95, 209, 361, 1045, 1091, 1805, 3971, 5455, 12001, 19855, 20729, 60005, 103645, 228019, 393851, 1140095, 1969255, 4332361, 21661805]

約数ペア:

[(1, 21661805), (5, 4332361), (11, 1969255), (19, 1140095), (55, 393851), (95, 228019), (209, 103645), (361, 60005), (1045, 20729), (1091, 19855), (1805, 12001), (3971, 5455)]