21085020

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{463}}^1$

素因数の和:512

約数の個数: 144

約数和(自身を含む): 72963072

約数和(自身を除く): 51878052

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 15, 18, 20, 22, 23, 30, 33, 36, 44, 45, 46, 55, 60, 66, 69, 90, 92, 99, 110, 115, 132, 138, 165, 180, 198, 207, 220, 230, 253, 276, 330, 345, 396, 414, 460, 463, 495, 506, 660, 690, 759, 828, 926, 990, 1012, 1035, 1265, 1380, 1389, 1518, 1852, 1980, 2070, 2277, 2315, 2530, 2778, 3036, 3795, 4140, 4167, 4554, 4630, 5060, 5093, 5556, 6945, 7590, 8334, 9108, 9260, 10186, 10649, 11385, 13890, 15180, 15279, 16668, 20372, 20835, 21298, 22770, 25465, 27780, 30558, 31947, 41670, 42596, 45540, 45837, 50930, 53245, 61116, 63894, 76395, 83340, 91674, 95841, 101860, 106490, 117139, 127788, 152790, 159735, 183348, 191682, 212980, 229185, 234278, 305580, 319470, 351417, 383364, 458370, 468556, 479205, 585695, 638940, 702834, 916740, 958410, 1054251, 1171390, 1405668, 1757085, 1916820, 2108502, 2342780, 3514170, 4217004, 5271255, 7028340, 10542510, 21085020]

約数ペア:

[(1, 21085020), (2, 10542510), (3, 7028340), (4, 5271255), (5, 4217004), (6, 3514170), (9, 2342780), (10, 2108502), (11, 1916820), (12, 1757085), (15, 1405668), (18, 1171390), (20, 1054251), (22, 958410), (23, 916740), (30, 702834), (33, 638940), (36, 585695), (44, 479205), (45, 468556), (46, 458370), (55, 383364), (60, 351417), (66, 319470), (69, 305580), (90, 234278), (92, 229185), (99, 212980), (110, 191682), (115, 183348), (132, 159735), (138, 152790), (165, 127788), (180, 117139), (198, 106490), (207, 101860), (220, 95841), (230, 91674), (253, 83340), (276, 76395), (330, 63894), (345, 61116), (396, 53245), (414, 50930), (460, 45837), (463, 45540), (495, 42596), (506, 41670), (660, 31947), (690, 30558), (759, 27780), (828, 25465), (926, 22770), (990, 21298), (1012, 20835), (1035, 20372), (1265, 16668), (1380, 15279), (1389, 15180), (1518, 13890), (1852, 11385), (1980, 10649), (2070, 10186), (2277, 9260), (2315, 9108), (2530, 8334), (2778, 7590), (3036, 6945), (3795, 5556), (4140, 5093), (4167, 5060), (4554, 4630)]