21060215

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{79}}^1\times {\mathrm{131}}^1$

素因数の和:263

約数の個数: 32

約数和(自身を含む): 28892160

約数和(自身を除く): 7831945

約数列:

[1, 5, 11, 37, 55, 79, 131, 185, 395, 407, 655, 869, 1441, 2035, 2923, 4345, 4847, 7205, 10349, 14615, 24235, 32153, 51745, 53317, 113839, 160765, 266585, 382913, 569195, 1914565, 4212043, 21060215]

約数ペア:

[(1, 21060215), (5, 4212043), (11, 1914565), (37, 569195), (55, 382913), (79, 266585), (131, 160765), (185, 113839), (395, 53317), (407, 51745), (655, 32153), (869, 24235), (1441, 14615), (2035, 10349), (2923, 7205), (4345, 4847)]