20807440

素因数分解:

$2^4\times 5^1\times {\mathrm{199}}^1\times {\mathrm{1307}}^1$

素因数の和:1519

約数の個数: 40

約数和(自身を含む): 48657600

約数和(自身を除く): 27850160

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 199, 398, 796, 995, 1307, 1592, 1990, 2614, 3184, 3980, 5228, 6535, 7960, 10456, 13070, 15920, 20912, 26140, 52280, 104560, 260093, 520186, 1040372, 1300465, 2080744, 2600930, 4161488, 5201860, 10403720, 20807440]

約数ペア:

[(1, 20807440), (2, 10403720), (4, 5201860), (5, 4161488), (8, 2600930), (10, 2080744), (16, 1300465), (20, 1040372), (40, 520186), (80, 260093), (199, 104560), (398, 52280), (796, 26140), (995, 20912), (1307, 15920), (1592, 13070), (1990, 10456), (2614, 7960), (3184, 6535), (3980, 5228)]