20178352

素因数分解:

$2^4\times {\mathrm{43}}^1\times {\mathrm{139}}^1\times {\mathrm{211}}^1$

素因数の和:401

約数の個数: 40

約数和(自身を含む): 40483520

約数和(自身を除く): 20305168

約数列:

[1, 2, 4, 8, 16, 43, 86, 139, 172, 211, 278, 344, 422, 556, 688, 844, 1112, 1688, 2224, 3376, 5977, 9073, 11954, 18146, 23908, 29329, 36292, 47816, 58658, 72584, 95632, 117316, 145168, 234632, 469264, 1261147, 2522294, 5044588, 10089176, 20178352]

約数ペア:

[(1, 20178352), (2, 10089176), (4, 5044588), (8, 2522294), (16, 1261147), (43, 469264), (86, 234632), (139, 145168), (172, 117316), (211, 95632), (278, 72584), (344, 58658), (422, 47816), (556, 36292), (688, 29329), (844, 23908), (1112, 18146), (1688, 11954), (2224, 9073), (3376, 5977)]