26920720

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{89}}^1\times {\mathrm{199}}^1$

素因数の和:320

約数の個数: 80

約数和(自身を含む): 66960000

約数和(自身を除く): 40039280

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 89, 95, 152, 178, 190, 199, 304, 356, 380, 398, 445, 712, 760, 796, 890, 995, 1424, 1520, 1592, 1691, 1780, 1990, 3184, 3382, 3560, 3781, 3980, 6764, 7120, 7562, 7960, 8455, 13528, 15124, 15920, 16910, 17711, 18905, 27056, 30248, 33820, 35422, 37810, 60496, 67640, 70844, 75620, 88555, 135280, 141688, 151240, 177110, 283376, 302480, 336509, 354220, 673018, 708440, 1346036, 1416880, 1682545, 2692072, 3365090, 5384144, 6730180, 13460360, 26920720]

約数ペア:

[(1, 26920720), (2, 13460360), (4, 6730180), (5, 5384144), (8, 3365090), (10, 2692072), (16, 1682545), (19, 1416880), (20, 1346036), (38, 708440), (40, 673018), (76, 354220), (80, 336509), (89, 302480), (95, 283376), (152, 177110), (178, 151240), (190, 141688), (199, 135280), (304, 88555), (356, 75620), (380, 70844), (398, 67640), (445, 60496), (712, 37810), (760, 35422), (796, 33820), (890, 30248), (995, 27056), (1424, 18905), (1520, 17711), (1592, 16910), (1691, 15920), (1780, 15124), (1990, 13528), (3184, 8455), (3382, 7960), (3560, 7562), (3781, 7120), (3980, 6764)]