20557544

素因数分解:

$2^3\times 7^1\times {\mathrm{19}}^1\times {\mathrm{139}}^2$

素因数の和:310

約数の個数: 48

約数和(自身を含む): 46706400

約数和(自身を除く): 26148856

約数列:

[1, 2, 4, 7, 8, 14, 19, 28, 38, 56, 76, 133, 139, 152, 266, 278, 532, 556, 973, 1064, 1112, 1946, 2641, 3892, 5282, 7784, 10564, 18487, 19321, 21128, 36974, 38642, 73948, 77284, 135247, 147896, 154568, 270494, 367099, 540988, 734198, 1081976, 1468396, 2569693, 2936792, 5139386, 10278772, 20557544]

約数ペア:

[(1, 20557544), (2, 10278772), (4, 5139386), (7, 2936792), (8, 2569693), (14, 1468396), (19, 1081976), (28, 734198), (38, 540988), (56, 367099), (76, 270494), (133, 154568), (139, 147896), (152, 135247), (266, 77284), (278, 73948), (532, 38642), (556, 36974), (973, 21128), (1064, 19321), (1112, 18487), (1946, 10564), (2641, 7784), (3892, 5282)]