30987775

素因数分解:

$5^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{257}}^1$

素因数の和:340

約数の個数: 48

約数和(自身を含む): 48371904

約数和(自身を除く): 17384129

約数列:

[1, 5, 7, 13, 25, 35, 53, 65, 91, 175, 257, 265, 325, 371, 455, 689, 1285, 1325, 1799, 1855, 2275, 3341, 3445, 4823, 6425, 8995, 9275, 13621, 16705, 17225, 23387, 24115, 44975, 68105, 83525, 95347, 116935, 120575, 177073, 340525, 476735, 584675, 885365, 1239511, 2383675, 4426825, 6197555, 30987775]

約数ペア:

[(1, 30987775), (5, 6197555), (7, 4426825), (13, 2383675), (25, 1239511), (35, 885365), (53, 584675), (65, 476735), (91, 340525), (175, 177073), (257, 120575), (265, 116935), (325, 95347), (371, 83525), (455, 68105), (689, 44975), (1285, 24115), (1325, 23387), (1799, 17225), (1855, 16705), (2275, 13621), (3341, 9275), (3445, 8995), (4823, 6425)]