19870972

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{53}}^1\times {\mathrm{8521}}^1$

素因数の和:8589

約数の個数: 24

約数和(自身を含む): 38655792

約数和(自身を除く): 18784820

約数列:

[1, 2, 4, 11, 22, 44, 53, 106, 212, 583, 1166, 2332, 8521, 17042, 34084, 93731, 187462, 374924, 451613, 903226, 1806452, 4967743, 9935486, 19870972]

約数ペア:

[(1, 19870972), (2, 9935486), (4, 4967743), (11, 1806452), (22, 903226), (44, 451613), (53, 374924), (106, 187462), (212, 93731), (583, 34084), (1166, 17042), (2332, 8521)]