21516880

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{499}}^1$

素因数の和:537

約数の個数: 120

約数和(自身を含む): 63612000

約数和(自身を除く): 42095120

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 16, 20, 22, 28, 35, 40, 44, 49, 55, 56, 70, 77, 80, 88, 98, 110, 112, 140, 154, 176, 196, 220, 245, 280, 308, 385, 392, 440, 490, 499, 539, 560, 616, 770, 784, 880, 980, 998, 1078, 1232, 1540, 1960, 1996, 2156, 2495, 2695, 3080, 3493, 3920, 3992, 4312, 4990, 5390, 5489, 6160, 6986, 7984, 8624, 9980, 10780, 10978, 13972, 17465, 19960, 21560, 21956, 24451, 27445, 27944, 34930, 38423, 39920, 43120, 43912, 48902, 54890, 55888, 69860, 76846, 87824, 97804, 109780, 122255, 139720, 153692, 192115, 195608, 219560, 244510, 268961, 279440, 307384, 384230, 391216, 439120, 489020, 537922, 614768, 768460, 978040, 1075844, 1344805, 1536920, 1956080, 2151688, 2689610, 3073840, 4303376, 5379220, 10758440, 21516880]

約数ペア:

[(1, 21516880), (2, 10758440), (4, 5379220), (5, 4303376), (7, 3073840), (8, 2689610), (10, 2151688), (11, 1956080), (14, 1536920), (16, 1344805), (20, 1075844), (22, 978040), (28, 768460), (35, 614768), (40, 537922), (44, 489020), (49, 439120), (55, 391216), (56, 384230), (70, 307384), (77, 279440), (80, 268961), (88, 244510), (98, 219560), (110, 195608), (112, 192115), (140, 153692), (154, 139720), (176, 122255), (196, 109780), (220, 97804), (245, 87824), (280, 76846), (308, 69860), (385, 55888), (392, 54890), (440, 48902), (490, 43912), (499, 43120), (539, 39920), (560, 38423), (616, 34930), (770, 27944), (784, 27445), (880, 24451), (980, 21956), (998, 21560), (1078, 19960), (1232, 17465), (1540, 13972), (1960, 10978), (1996, 10780), (2156, 9980), (2495, 8624), (2695, 7984), (3080, 6986), (3493, 6160), (3920, 5489), (3992, 5390), (4312, 4990)]