21948017

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1\times {\mathrm{79}}^1$

素因数の和:213

約数の個数: 32

約数和(自身を含む): 28385280

約数和(自身を除く): 6437263

約数列:

[1, 7, 13, 43, 71, 79, 91, 301, 497, 553, 559, 923, 1027, 3053, 3397, 3913, 5609, 6461, 7189, 21371, 23779, 39263, 39689, 44161, 72917, 241187, 277823, 309127, 510419, 1688309, 3135431, 21948017]

約数ペア:

[(1, 21948017), (7, 3135431), (13, 1688309), (43, 510419), (71, 309127), (79, 277823), (91, 241187), (301, 72917), (497, 44161), (553, 39689), (559, 39263), (923, 23779), (1027, 21371), (3053, 7189), (3397, 6461), (3913, 5609)]