19878320

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{461}}^1$

素因数の和:499

約数の個数: 120

約数和(自身を含む): 58777488

約数和(自身を除く): 38899168

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, 461, 490, 539, 560, 616, 770, 784, 880, 922, 980, 1078, 1232, 1540, 1844, 1960, 2156, 2305, 2695, 3080, 3227, 3688, 3920, 4312, 4610, 5071, 5390, 6160, 6454, 7376, 8624, 9220, 10142, 10780, 12908, 16135, 18440, 20284, 21560, 22589, 25355, 25816, 32270, 35497, 36880, 40568, 43120, 45178, 50710, 51632, 64540, 70994, 81136, 90356, 101420, 112945, 129080, 141988, 177485, 180712, 202840, 225890, 248479, 258160, 283976, 354970, 361424, 405680, 451780, 496958, 567952, 709940, 903560, 993916, 1242395, 1419880, 1807120, 1987832, 2484790, 2839760, 3975664, 4969580, 9939160, 19878320]

約数ペア:

[(1, 19878320), (2, 9939160), (4, 4969580), (5, 3975664), (7, 2839760), (8, 2484790), (10, 1987832), (11, 1807120), (14, 1419880), (16, 1242395), (20, 993916), (22, 903560), (28, 709940), (35, 567952), (40, 496958), (44, 451780), (49, 405680), (55, 361424), (56, 354970), (70, 283976), (77, 258160), (80, 248479), (88, 225890), (98, 202840), (110, 180712), (112, 177485), (140, 141988), (154, 129080), (176, 112945), (196, 101420), (220, 90356), (245, 81136), (280, 70994), (308, 64540), (385, 51632), (392, 50710), (440, 45178), (461, 43120), (490, 40568), (539, 36880), (560, 35497), (616, 32270), (770, 25816), (784, 25355), (880, 22589), (922, 21560), (980, 20284), (1078, 18440), (1232, 16135), (1540, 12908), (1844, 10780), (1960, 10142), (2156, 9220), (2305, 8624), (2695, 7376), (3080, 6454), (3227, 6160), (3688, 5390), (3920, 5071), (4312, 4610)]