21027615

素因数分解:

$3^1\times 5^1\times 7^3\times {\mathrm{61}}^1\times {\mathrm{67}}^1$

素因数の和:157

約数の個数: 64

約数和(自身を含む): 40473600

約数和(自身を除く): 19445985

約数列:

[1, 3, 5, 7, 15, 21, 35, 49, 61, 67, 105, 147, 183, 201, 245, 305, 335, 343, 427, 469, 735, 915, 1005, 1029, 1281, 1407, 1715, 2135, 2345, 2989, 3283, 4087, 5145, 6405, 7035, 8967, 9849, 12261, 14945, 16415, 20435, 20923, 22981, 28609, 44835, 49245, 61305, 62769, 68943, 85827, 104615, 114905, 143045, 200263, 313845, 344715, 429135, 600789, 1001315, 1401841, 3003945, 4205523, 7009205, 21027615]

約数ペア:

[(1, 21027615), (3, 7009205), (5, 4205523), (7, 3003945), (15, 1401841), (21, 1001315), (35, 600789), (49, 429135), (61, 344715), (67, 313845), (105, 200263), (147, 143045), (183, 114905), (201, 104615), (245, 85827), (305, 68943), (335, 62769), (343, 61305), (427, 49245), (469, 44835), (735, 28609), (915, 22981), (1005, 20923), (1029, 20435), (1281, 16415), (1407, 14945), (1715, 12261), (2135, 9849), (2345, 8967), (2989, 7035), (3283, 6405), (4087, 5145)]