20812000

素因数分解:

$2^5\times 5^3\times {\mathrm{11}}^2\times {\mathrm{43}}^1$

素因数の和:90

約数の個数: 144

約数和(自身を含む): 57513456

約数和(自身を除く): 36701456

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 25, 32, 40, 43, 44, 50, 55, 80, 86, 88, 100, 110, 121, 125, 160, 172, 176, 200, 215, 220, 242, 250, 275, 344, 352, 400, 430, 440, 473, 484, 500, 550, 605, 688, 800, 860, 880, 946, 968, 1000, 1075, 1100, 1210, 1375, 1376, 1720, 1760, 1892, 1936, 2000, 2150, 2200, 2365, 2420, 2750, 3025, 3440, 3784, 3872, 4000, 4300, 4400, 4730, 4840, 5203, 5375, 5500, 6050, 6880, 7568, 8600, 8800, 9460, 9680, 10406, 10750, 11000, 11825, 12100, 15125, 15136, 17200, 18920, 19360, 20812, 21500, 22000, 23650, 24200, 26015, 30250, 34400, 37840, 41624, 43000, 44000, 47300, 48400, 52030, 59125, 60500, 75680, 83248, 86000, 94600, 96800, 104060, 118250, 121000, 130075, 166496, 172000, 189200, 208120, 236500, 242000, 260150, 378400, 416240, 473000, 484000, 520300, 650375, 832480, 946000, 1040600, 1300750, 1892000, 2081200, 2601500, 4162400, 5203000, 10406000, 20812000]

約数ペア:

[(1, 20812000), (2, 10406000), (4, 5203000), (5, 4162400), (8, 2601500), (10, 2081200), (11, 1892000), (16, 1300750), (20, 1040600), (22, 946000), (25, 832480), (32, 650375), (40, 520300), (43, 484000), (44, 473000), (50, 416240), (55, 378400), (80, 260150), (86, 242000), (88, 236500), (100, 208120), (110, 189200), (121, 172000), (125, 166496), (160, 130075), (172, 121000), (176, 118250), (200, 104060), (215, 96800), (220, 94600), (242, 86000), (250, 83248), (275, 75680), (344, 60500), (352, 59125), (400, 52030), (430, 48400), (440, 47300), (473, 44000), (484, 43000), (500, 41624), (550, 37840), (605, 34400), (688, 30250), (800, 26015), (860, 24200), (880, 23650), (946, 22000), (968, 21500), (1000, 20812), (1075, 19360), (1100, 18920), (1210, 17200), (1375, 15136), (1376, 15125), (1720, 12100), (1760, 11825), (1892, 11000), (1936, 10750), (2000, 10406), (2150, 9680), (2200, 9460), (2365, 8800), (2420, 8600), (2750, 7568), (3025, 6880), (3440, 6050), (3784, 5500), (3872, 5375), (4000, 5203), (4300, 4840), (4400, 4730)]