20866748

素因数分解:

$2^2\times 7^3\times {\mathrm{67}}^1\times {\mathrm{227}}^1$

素因数の和:319

約数の個数: 48

約数和(自身を含む): 43411200

約数和(自身を除く): 22544452

約数列:

[1, 2, 4, 7, 14, 28, 49, 67, 98, 134, 196, 227, 268, 343, 454, 469, 686, 908, 938, 1372, 1589, 1876, 3178, 3283, 6356, 6566, 11123, 13132, 15209, 22246, 22981, 30418, 44492, 45962, 60836, 77861, 91924, 106463, 155722, 212926, 311444, 425852, 745241, 1490482, 2980964, 5216687, 10433374, 20866748]

約数ペア:

[(1, 20866748), (2, 10433374), (4, 5216687), (7, 2980964), (14, 1490482), (28, 745241), (49, 425852), (67, 311444), (98, 212926), (134, 155722), (196, 106463), (227, 91924), (268, 77861), (343, 60836), (454, 45962), (469, 44492), (686, 30418), (908, 22981), (938, 22246), (1372, 15209), (1589, 13132), (1876, 11123), (3178, 6566), (3283, 6356)]