21571555

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^3\times {\mathrm{37}}^1$

素因数の和:116

約数の個数: 32

約数和(自身を含む): 29712960

約数和(自身を除く): 8141405

約数列:

[1, 5, 17, 19, 37, 85, 95, 185, 323, 361, 629, 703, 1615, 1805, 3145, 3515, 6137, 6859, 11951, 13357, 30685, 34295, 59755, 66785, 116603, 227069, 253783, 583015, 1135345, 1268915, 4314311, 21571555]

約数ペア:

[(1, 21571555), (5, 4314311), (17, 1268915), (19, 1135345), (37, 583015), (85, 253783), (95, 227069), (185, 116603), (323, 66785), (361, 59755), (629, 34295), (703, 30685), (1615, 13357), (1805, 11951), (3145, 6859), (3515, 6137)]