21033040

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{23}}^2\times {\mathrm{71}}^1$

素因数の和:137

約数の個数: 120

約数和(自身を含む): 59246208

約数和(自身を除く): 38213168

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 23, 28, 35, 40, 46, 56, 70, 71, 80, 92, 112, 115, 140, 142, 161, 184, 230, 280, 284, 322, 355, 368, 460, 497, 529, 560, 568, 644, 710, 805, 920, 994, 1058, 1136, 1288, 1420, 1610, 1633, 1840, 1988, 2116, 2485, 2576, 2645, 2840, 3220, 3266, 3703, 3976, 4232, 4970, 5290, 5680, 6440, 6532, 7406, 7952, 8165, 8464, 9940, 10580, 11431, 12880, 13064, 14812, 16330, 18515, 19880, 21160, 22862, 26128, 29624, 32660, 37030, 37559, 39760, 42320, 45724, 57155, 59248, 65320, 74060, 75118, 91448, 114310, 130640, 148120, 150236, 182896, 187795, 228620, 262913, 296240, 300472, 375590, 457240, 525826, 600944, 751180, 914480, 1051652, 1314565, 1502360, 2103304, 2629130, 3004720, 4206608, 5258260, 10516520, 21033040]

約数ペア:

[(1, 21033040), (2, 10516520), (4, 5258260), (5, 4206608), (7, 3004720), (8, 2629130), (10, 2103304), (14, 1502360), (16, 1314565), (20, 1051652), (23, 914480), (28, 751180), (35, 600944), (40, 525826), (46, 457240), (56, 375590), (70, 300472), (71, 296240), (80, 262913), (92, 228620), (112, 187795), (115, 182896), (140, 150236), (142, 148120), (161, 130640), (184, 114310), (230, 91448), (280, 75118), (284, 74060), (322, 65320), (355, 59248), (368, 57155), (460, 45724), (497, 42320), (529, 39760), (560, 37559), (568, 37030), (644, 32660), (710, 29624), (805, 26128), (920, 22862), (994, 21160), (1058, 19880), (1136, 18515), (1288, 16330), (1420, 14812), (1610, 13064), (1633, 12880), (1840, 11431), (1988, 10580), (2116, 9940), (2485, 8464), (2576, 8165), (2645, 7952), (2840, 7406), (3220, 6532), (3266, 6440), (3703, 5680), (3976, 5290), (4232, 4970)]