18040000

素因数分解:

$2^6\times 5^4\times {\mathrm{11}}^1\times {\mathrm{41}}^1$

素因数の和:84

約数の個数: 140

約数和(自身を含む): 49990248

約数和(自身を除く): 31950248

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 25, 32, 40, 41, 44, 50, 55, 64, 80, 82, 88, 100, 110, 125, 160, 164, 176, 200, 205, 220, 250, 275, 320, 328, 352, 400, 410, 440, 451, 500, 550, 625, 656, 704, 800, 820, 880, 902, 1000, 1025, 1100, 1250, 1312, 1375, 1600, 1640, 1760, 1804, 2000, 2050, 2200, 2255, 2500, 2624, 2750, 3280, 3520, 3608, 4000, 4100, 4400, 4510, 5000, 5125, 5500, 6560, 6875, 7216, 8000, 8200, 8800, 9020, 10000, 10250, 11000, 11275, 13120, 13750, 14432, 16400, 17600, 18040, 20000, 20500, 22000, 22550, 25625, 27500, 28864, 32800, 36080, 40000, 41000, 44000, 45100, 51250, 55000, 56375, 65600, 72160, 82000, 88000, 90200, 102500, 110000, 112750, 144320, 164000, 180400, 205000, 220000, 225500, 281875, 328000, 360800, 410000, 440000, 451000, 563750, 721600, 820000, 902000, 1127500, 1640000, 1804000, 2255000, 3608000, 4510000, 9020000, 18040000]

約数ペア:

[(1, 18040000), (2, 9020000), (4, 4510000), (5, 3608000), (8, 2255000), (10, 1804000), (11, 1640000), (16, 1127500), (20, 902000), (22, 820000), (25, 721600), (32, 563750), (40, 451000), (41, 440000), (44, 410000), (50, 360800), (55, 328000), (64, 281875), (80, 225500), (82, 220000), (88, 205000), (100, 180400), (110, 164000), (125, 144320), (160, 112750), (164, 110000), (176, 102500), (200, 90200), (205, 88000), (220, 82000), (250, 72160), (275, 65600), (320, 56375), (328, 55000), (352, 51250), (400, 45100), (410, 44000), (440, 41000), (451, 40000), (500, 36080), (550, 32800), (625, 28864), (656, 27500), (704, 25625), (800, 22550), (820, 22000), (880, 20500), (902, 20000), (1000, 18040), (1025, 17600), (1100, 16400), (1250, 14432), (1312, 13750), (1375, 13120), (1600, 11275), (1640, 11000), (1760, 10250), (1804, 10000), (2000, 9020), (2050, 8800), (2200, 8200), (2255, 8000), (2500, 7216), (2624, 6875), (2750, 6560), (3280, 5500), (3520, 5125), (3608, 5000), (4000, 4510), (4100, 4400)]