20689456

素因数分解:

$2^4\times {\mathrm{619}}^1\times {\mathrm{2089}}^1$

素因数の和:2716

約数の個数: 20

約数和(自身を含む): 40169800

約数和(自身を除く): 19480344

約数列:

[1, 2, 4, 8, 16, 619, 1238, 2089, 2476, 4178, 4952, 8356, 9904, 16712, 33424, 1293091, 2586182, 5172364, 10344728, 20689456]

約数ペア:

[(1, 20689456), (2, 10344728), (4, 5172364), (8, 2586182), (16, 1293091), (619, 33424), (1238, 16712), (2089, 9904), (2476, 8356), (4178, 4952)]