20685665

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{4133}}^1$

素因数の和:4169

約数の個数: 32

約数和(自身を含む): 33336576

約数和(自身を除く): 12650911

約数列:

[1, 5, 7, 11, 13, 35, 55, 65, 77, 91, 143, 385, 455, 715, 1001, 4133, 5005, 20665, 28931, 45463, 53729, 144655, 227315, 268645, 318241, 376103, 591019, 1591205, 1880515, 2955095, 4137133, 20685665]

約数ペア:

[(1, 20685665), (5, 4137133), (7, 2955095), (11, 1880515), (13, 1591205), (35, 591019), (55, 376103), (65, 318241), (77, 268645), (91, 227315), (143, 144655), (385, 53729), (455, 45463), (715, 28931), (1001, 20665), (4133, 5005)]