21491624

素因数分解:

$2^3\times 7^1\times {\mathrm{11}}^1\times {\mathrm{139}}^1\times {\mathrm{251}}^1$

素因数の和:414

約数の個数: 64

約数和(自身を含む): 50803200

約数和(自身を除く): 29311576

約数列:

[1, 2, 4, 7, 8, 11, 14, 22, 28, 44, 56, 77, 88, 139, 154, 251, 278, 308, 502, 556, 616, 973, 1004, 1112, 1529, 1757, 1946, 2008, 2761, 3058, 3514, 3892, 5522, 6116, 7028, 7784, 10703, 11044, 12232, 14056, 19327, 21406, 22088, 34889, 38654, 42812, 69778, 77308, 85624, 139556, 154616, 244223, 279112, 383779, 488446, 767558, 976892, 1535116, 1953784, 2686453, 3070232, 5372906, 10745812, 21491624]

約数ペア:

[(1, 21491624), (2, 10745812), (4, 5372906), (7, 3070232), (8, 2686453), (11, 1953784), (14, 1535116), (22, 976892), (28, 767558), (44, 488446), (56, 383779), (77, 279112), (88, 244223), (139, 154616), (154, 139556), (251, 85624), (278, 77308), (308, 69778), (502, 42812), (556, 38654), (616, 34889), (973, 22088), (1004, 21406), (1112, 19327), (1529, 14056), (1757, 12232), (1946, 11044), (2008, 10703), (2761, 7784), (3058, 7028), (3514, 6116), (3892, 5522)]