21000979285

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{223}}^1\times {\mathrm{131713}}^1$

素因数の和:131965

約数の個数: 32

約数和(自身を含む): 29739967488

約数和(自身を除く): 8738988203

約数列:

[1, 5, 11, 13, 55, 65, 143, 223, 715, 1115, 2453, 2899, 12265, 14495, 31889, 131713, 159445, 658565, 1448843, 1712269, 7244215, 8561345, 18834959, 29371999, 94174795, 146859995, 323091989, 381835987, 1615459945, 1909179935, 4200195857, 21000979285]

約数ペア:

[(1, 21000979285), (5, 4200195857), (11, 1909179935), (13, 1615459945), (55, 381835987), (65, 323091989), (143, 146859995), (223, 94174795), (715, 29371999), (1115, 18834959), (2453, 8561345), (2899, 7244215), (12265, 1712269), (14495, 1448843), (31889, 658565), (131713, 159445)]