21000723292808

素因数分解:

$2^3\times 7^1\times {\mathrm{157}}^1\times {\mathrm{1723}}^1\times {\mathrm{1386313}}^1$

素因数の和:1388206

約数の個数: 64

約数和(自身を含む): 45314501170560

約数和(自身を除く): 24313777877752

約数列:

[1, 2, 4, 7, 8, 14, 28, 56, 157, 314, 628, 1099, 1256, 1723, 2198, 3446, 4396, 6892, 8792, 12061, 13784, 24122, 48244, 96488, 270511, 541022, 1082044, 1386313, 1893577, 2164088, 2772626, 3787154, 5545252, 7574308, 9704191, 11090504, 15148616, 19408382, 38816764, 77633528, 217651141, 435302282, 870604564, 1523557987, 1741209128, 2388617299, 3047115974, 4777234598, 6094231948, 9554469196, 12188463896, 16720321093, 19108938392, 33440642186, 66881284372, 133762568744, 375012915943, 750025831886, 1500051663772, 2625090411601, 3000103327544, 5250180823202, 10500361646404, 21000723292808]

約数ペア:

[(1, 21000723292808), (2, 10500361646404), (4, 5250180823202), (7, 3000103327544), (8, 2625090411601), (14, 1500051663772), (28, 750025831886), (56, 375012915943), (157, 133762568744), (314, 66881284372), (628, 33440642186), (1099, 19108938392), (1256, 16720321093), (1723, 12188463896), (2198, 9554469196), (3446, 6094231948), (4396, 4777234598), (6892, 3047115974), (8792, 2388617299), (12061, 1741209128), (13784, 1523557987), (24122, 870604564), (48244, 435302282), (96488, 217651141), (270511, 77633528), (541022, 38816764), (1082044, 19408382), (1386313, 15148616), (1893577, 11090504), (2164088, 9704191), (2772626, 7574308), (3787154, 5545252)]