21720680

素因数分解:

$2^3\times 5^1\times {\mathrm{543017}}^1$

素因数の和:543028

約数の個数: 16

約数和(自身を含む): 48871620

約数和(自身を除く): 27150940

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 543017, 1086034, 2172068, 2715085, 4344136, 5430170, 10860340, 21720680]

約数ペア:

[(1, 21720680), (2, 10860340), (4, 5430170), (5, 4344136), (8, 2715085), (10, 2172068), (20, 1086034), (40, 543017)]