21163156

素因数分解:

$2^2\times 7^1\times {\mathrm{29}}^1\times {\mathrm{67}}^1\times {\mathrm{389}}^1$

素因数の和:496

約数の個数: 48

約数和(自身を含む): 44553600

約数和(自身を除く): 23390444

約数列:

[1, 2, 4, 7, 14, 28, 29, 58, 67, 116, 134, 203, 268, 389, 406, 469, 778, 812, 938, 1556, 1876, 1943, 2723, 3886, 5446, 7772, 10892, 11281, 13601, 22562, 26063, 27202, 45124, 52126, 54404, 78967, 104252, 157934, 182441, 315868, 364882, 729764, 755827, 1511654, 3023308, 5290789, 10581578, 21163156]

約数ペア:

[(1, 21163156), (2, 10581578), (4, 5290789), (7, 3023308), (14, 1511654), (28, 755827), (29, 729764), (58, 364882), (67, 315868), (116, 182441), (134, 157934), (203, 104252), (268, 78967), (389, 54404), (406, 52126), (469, 45124), (778, 27202), (812, 26063), (938, 22562), (1556, 13601), (1876, 11281), (1943, 10892), (2723, 7772), (3886, 5446)]