20968208

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{127}}^1\times {\mathrm{607}}^1$

素因数の和:759

約数の個数: 40

約数和(自身を含む): 43425792

約数和(自身を除く): 22457584

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 127, 136, 254, 272, 508, 607, 1016, 1214, 2032, 2159, 2428, 4318, 4856, 8636, 9712, 10319, 17272, 20638, 34544, 41276, 77089, 82552, 154178, 165104, 308356, 616712, 1233424, 1310513, 2621026, 5242052, 10484104, 20968208]

約数ペア:

[(1, 20968208), (2, 10484104), (4, 5242052), (8, 2621026), (16, 1310513), (17, 1233424), (34, 616712), (68, 308356), (127, 165104), (136, 154178), (254, 82552), (272, 77089), (508, 41276), (607, 34544), (1016, 20638), (1214, 17272), (2032, 10319), (2159, 9712), (2428, 8636), (4318, 4856)]