20051240

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{199}}^1\times {\mathrm{229}}^1$

素因数の和:450

約数の個数: 64

約数和(自身を含む): 49680000

約数和(自身を除く): 29628760

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 199, 220, 229, 398, 440, 458, 796, 916, 995, 1145, 1592, 1832, 1990, 2189, 2290, 2519, 3980, 4378, 4580, 5038, 7960, 8756, 9160, 10076, 10945, 12595, 17512, 20152, 21890, 25190, 43780, 45571, 50380, 87560, 91142, 100760, 182284, 227855, 364568, 455710, 501281, 911420, 1002562, 1822840, 2005124, 2506405, 4010248, 5012810, 10025620, 20051240]

約数ペア:

[(1, 20051240), (2, 10025620), (4, 5012810), (5, 4010248), (8, 2506405), (10, 2005124), (11, 1822840), (20, 1002562), (22, 911420), (40, 501281), (44, 455710), (55, 364568), (88, 227855), (110, 182284), (199, 100760), (220, 91142), (229, 87560), (398, 50380), (440, 45571), (458, 43780), (796, 25190), (916, 21890), (995, 20152), (1145, 17512), (1592, 12595), (1832, 10945), (1990, 10076), (2189, 9160), (2290, 8756), (2519, 7960), (3980, 5038), (4378, 4580)]