351032020

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{199}}^1\times {\mathrm{991}}^1$

素因数の和:1288

約数の個数: 48

約数和(自身を含む): 749952000

約数和(自身を除く): 398919980

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 199, 356, 398, 445, 796, 890, 991, 995, 1780, 1982, 1990, 3964, 3980, 4955, 9910, 17711, 19820, 35422, 70844, 88199, 88555, 176398, 177110, 197209, 352796, 354220, 394418, 440995, 788836, 881990, 986045, 1763980, 1972090, 3944180, 17551601, 35103202, 70206404, 87758005, 175516010, 351032020]

約数ペア:

[(1, 351032020), (2, 175516010), (4, 87758005), (5, 70206404), (10, 35103202), (20, 17551601), (89, 3944180), (178, 1972090), (199, 1763980), (356, 986045), (398, 881990), (445, 788836), (796, 440995), (890, 394418), (991, 354220), (995, 352796), (1780, 197209), (1982, 177110), (1990, 176398), (3964, 88555), (3980, 88199), (4955, 70844), (9910, 35422), (17711, 19820)]