20321880

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{199}}^1$

素因数の和:273

約数の個数: 128

約数和(自身を含む): 65664000

約数和(自身を除く): 45342120

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 23, 24, 30, 37, 40, 46, 60, 69, 74, 92, 111, 115, 120, 138, 148, 184, 185, 199, 222, 230, 276, 296, 345, 370, 398, 444, 460, 552, 555, 597, 690, 740, 796, 851, 888, 920, 995, 1110, 1194, 1380, 1480, 1592, 1702, 1990, 2220, 2388, 2553, 2760, 2985, 3404, 3980, 4255, 4440, 4577, 4776, 5106, 5970, 6808, 7363, 7960, 8510, 9154, 10212, 11940, 12765, 13731, 14726, 17020, 18308, 20424, 22089, 22885, 23880, 25530, 27462, 29452, 34040, 36616, 36815, 44178, 45770, 51060, 54924, 58904, 68655, 73630, 88356, 91540, 102120, 109848, 110445, 137310, 147260, 169349, 176712, 183080, 220890, 274620, 294520, 338698, 441780, 508047, 549240, 677396, 846745, 883560, 1016094, 1354792, 1693490, 2032188, 2540235, 3386980, 4064376, 5080470, 6773960, 10160940, 20321880]

約数ペア:

[(1, 20321880), (2, 10160940), (3, 6773960), (4, 5080470), (5, 4064376), (6, 3386980), (8, 2540235), (10, 2032188), (12, 1693490), (15, 1354792), (20, 1016094), (23, 883560), (24, 846745), (30, 677396), (37, 549240), (40, 508047), (46, 441780), (60, 338698), (69, 294520), (74, 274620), (92, 220890), (111, 183080), (115, 176712), (120, 169349), (138, 147260), (148, 137310), (184, 110445), (185, 109848), (199, 102120), (222, 91540), (230, 88356), (276, 73630), (296, 68655), (345, 58904), (370, 54924), (398, 51060), (444, 45770), (460, 44178), (552, 36815), (555, 36616), (597, 34040), (690, 29452), (740, 27462), (796, 25530), (851, 23880), (888, 22885), (920, 22089), (995, 20424), (1110, 18308), (1194, 17020), (1380, 14726), (1480, 13731), (1592, 12765), (1702, 11940), (1990, 10212), (2220, 9154), (2388, 8510), (2553, 7960), (2760, 7363), (2985, 6808), (3404, 5970), (3980, 5106), (4255, 4776), (4440, 4577)]