20501404

素因数分解:

$2^2\times 7^2\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{257}}^1$

素因数の和:323

約数の個数: 72

約数和(自身を含む): 46941552

約数和(自身を除く): 26440148

約数列:

[1, 2, 4, 7, 11, 14, 22, 28, 37, 44, 49, 74, 77, 98, 148, 154, 196, 257, 259, 308, 407, 514, 518, 539, 814, 1028, 1036, 1078, 1628, 1799, 1813, 2156, 2827, 2849, 3598, 3626, 5654, 5698, 7196, 7252, 9509, 11308, 11396, 12593, 19018, 19789, 19943, 25186, 38036, 39578, 39886, 50372, 66563, 79156, 79772, 104599, 133126, 138523, 209198, 266252, 277046, 418396, 465941, 554092, 732193, 931882, 1464386, 1863764, 2928772, 5125351, 10250702, 20501404]

約数ペア:

[(1, 20501404), (2, 10250702), (4, 5125351), (7, 2928772), (11, 1863764), (14, 1464386), (22, 931882), (28, 732193), (37, 554092), (44, 465941), (49, 418396), (74, 277046), (77, 266252), (98, 209198), (148, 138523), (154, 133126), (196, 104599), (257, 79772), (259, 79156), (308, 66563), (407, 50372), (514, 39886), (518, 39578), (539, 38036), (814, 25186), (1028, 19943), (1036, 19789), (1078, 19018), (1628, 12593), (1799, 11396), (1813, 11308), (2156, 9509), (2827, 7252), (2849, 7196), (3598, 5698), (3626, 5654)]