19816500977

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{305419}}^1$

素因数の和:305493

約数の個数: 32

約数和(自身を含む): 26271006720

約数和(自身を除く): 6454505743

約数列:

[1, 7, 13, 23, 31, 91, 161, 217, 299, 403, 713, 2093, 2821, 4991, 9269, 64883, 305419, 2137933, 3970447, 7024637, 9467989, 27793129, 49172459, 66275923, 91320281, 123083857, 217763747, 639241967, 861586999, 1524346229, 2830928711, 19816500977]

約数ペア:

[(1, 19816500977), (7, 2830928711), (13, 1524346229), (23, 861586999), (31, 639241967), (91, 217763747), (161, 123083857), (217, 91320281), (299, 66275923), (403, 49172459), (713, 27793129), (2093, 9467989), (2821, 7024637), (4991, 3970447), (9269, 2137933), (64883, 305419)]