21986783

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{71}}^1\times {\mathrm{83}}^1$

素因数の和:215

約数の個数: 32

約数和(自身を含む): 28449792

約数和(自身を除く): 6463009

約数列:

[1, 7, 13, 41, 71, 83, 91, 287, 497, 533, 581, 923, 1079, 2911, 3403, 3731, 5893, 6461, 7553, 20377, 23821, 37843, 41251, 44239, 76609, 241613, 264901, 309673, 536263, 1691291, 3140969, 21986783]

約数ペア:

[(1, 21986783), (7, 3140969), (13, 1691291), (41, 536263), (71, 309673), (83, 264901), (91, 241613), (287, 76609), (497, 44239), (533, 41251), (581, 37843), (923, 23821), (1079, 20377), (2911, 7553), (3403, 6461), (3731, 5893)]