15776720

素因数分解:

$2^4\times 5^1\times {\mathrm{199}}^1\times {\mathrm{991}}^1$

素因数の和:1203

約数の個数: 40

約数和(自身を含む): 36902400

約数和(自身を除く): 21125680

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 199, 398, 796, 991, 995, 1592, 1982, 1990, 3184, 3964, 3980, 4955, 7928, 7960, 9910, 15856, 15920, 19820, 39640, 79280, 197209, 394418, 788836, 986045, 1577672, 1972090, 3155344, 3944180, 7888360, 15776720]

約数ペア:

[(1, 15776720), (2, 7888360), (4, 3944180), (5, 3155344), (8, 1972090), (10, 1577672), (16, 986045), (20, 788836), (40, 394418), (80, 197209), (199, 79280), (398, 39640), (796, 19820), (991, 15920), (995, 15856), (1592, 9910), (1982, 7960), (1990, 7928), (3184, 4955), (3964, 3980)]