20889729

素因数分解:

$3^2\times 7^3\times {\mathrm{67}}^1\times {\mathrm{101}}^1$

素因数の和:195

約数の個数: 48

約数和(自身を含む): 36067200

約数和(自身を除く): 15177471

約数列:

[1, 3, 7, 9, 21, 49, 63, 67, 101, 147, 201, 303, 343, 441, 469, 603, 707, 909, 1029, 1407, 2121, 3087, 3283, 4221, 4949, 6363, 6767, 9849, 14847, 20301, 22981, 29547, 34643, 44541, 47369, 60903, 68943, 103929, 142107, 206829, 311787, 331583, 426321, 994749, 2321081, 2984247, 6963243, 20889729]

約数ペア:

[(1, 20889729), (3, 6963243), (7, 2984247), (9, 2321081), (21, 994749), (49, 426321), (63, 331583), (67, 311787), (101, 206829), (147, 142107), (201, 103929), (303, 68943), (343, 60903), (441, 47369), (469, 44541), (603, 34643), (707, 29547), (909, 22981), (1029, 20301), (1407, 14847), (2121, 9849), (3087, 6767), (3283, 6363), (4221, 4949)]