20078828

素因数分解:

$2^2\times 7^2\times {\mathrm{11}}^1\times {\mathrm{67}}^1\times {\mathrm{139}}^1$

素因数の和:235

約数の個数: 72

約数和(自身を含む): 45581760

約数和(自身を除く): 25502932

約数列:

[1, 2, 4, 7, 11, 14, 22, 28, 44, 49, 67, 77, 98, 134, 139, 154, 196, 268, 278, 308, 469, 539, 556, 737, 938, 973, 1078, 1474, 1529, 1876, 1946, 2156, 2948, 3058, 3283, 3892, 5159, 6116, 6566, 6811, 9313, 10318, 10703, 13132, 13622, 18626, 20636, 21406, 27244, 36113, 37252, 42812, 65191, 72226, 74921, 102443, 130382, 144452, 149842, 204886, 260764, 299684, 409772, 456337, 717101, 912674, 1434202, 1825348, 2868404, 5019707, 10039414, 20078828]

約数ペア:

[(1, 20078828), (2, 10039414), (4, 5019707), (7, 2868404), (11, 1825348), (14, 1434202), (22, 912674), (28, 717101), (44, 456337), (49, 409772), (67, 299684), (77, 260764), (98, 204886), (134, 149842), (139, 144452), (154, 130382), (196, 102443), (268, 74921), (278, 72226), (308, 65191), (469, 42812), (539, 37252), (556, 36113), (737, 27244), (938, 21406), (973, 20636), (1078, 18626), (1474, 13622), (1529, 13132), (1876, 10703), (1946, 10318), (2156, 9313), (2948, 6811), (3058, 6566), (3283, 6116), (3892, 5159)]