21017800

素因数分解:

$2^3\times 5^2\times {\mathrm{19}}^1\times {\mathrm{5531}}^1$

素因数の和:5566

約数の個数: 48

約数和(自身を含む): 51447600

約数和(自身を除く): 30429800

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 25, 38, 40, 50, 76, 95, 100, 152, 190, 200, 380, 475, 760, 950, 1900, 3800, 5531, 11062, 22124, 27655, 44248, 55310, 105089, 110620, 138275, 210178, 221240, 276550, 420356, 525445, 553100, 840712, 1050890, 1106200, 2101780, 2627225, 4203560, 5254450, 10508900, 21017800]

約数ペア:

[(1, 21017800), (2, 10508900), (4, 5254450), (5, 4203560), (8, 2627225), (10, 2101780), (19, 1106200), (20, 1050890), (25, 840712), (38, 553100), (40, 525445), (50, 420356), (76, 276550), (95, 221240), (100, 210178), (152, 138275), (190, 110620), (200, 105089), (380, 55310), (475, 44248), (760, 27655), (950, 22124), (1900, 11062), (3800, 5531)]