20268801

素因数分解:

$3^2\times 7^2\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{59}}^1$

素因数の和:139

約数の個数: 72

約数和(自身を含む): 37346400

約数和(自身を除く): 17077599

約数列:

[1, 3, 7, 9, 19, 21, 41, 49, 57, 59, 63, 123, 133, 147, 171, 177, 287, 369, 399, 413, 441, 531, 779, 861, 931, 1121, 1197, 1239, 2009, 2337, 2419, 2583, 2793, 2891, 3363, 3717, 5453, 6027, 7011, 7257, 7847, 8379, 8673, 10089, 16359, 16933, 18081, 21771, 23541, 26019, 38171, 45961, 49077, 50799, 54929, 70623, 114513, 118531, 137883, 152397, 164787, 321727, 343539, 355593, 413649, 494361, 965181, 1066779, 2252089, 2895543, 6756267, 20268801]

約数ペア:

[(1, 20268801), (3, 6756267), (7, 2895543), (9, 2252089), (19, 1066779), (21, 965181), (41, 494361), (49, 413649), (57, 355593), (59, 343539), (63, 321727), (123, 164787), (133, 152397), (147, 137883), (171, 118531), (177, 114513), (287, 70623), (369, 54929), (399, 50799), (413, 49077), (441, 45961), (531, 38171), (779, 26019), (861, 23541), (931, 21771), (1121, 18081), (1197, 16933), (1239, 16359), (2009, 10089), (2337, 8673), (2419, 8379), (2583, 7847), (2793, 7257), (2891, 7011), (3363, 6027), (3717, 5453)]