21817235

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{71}}^1\times {\mathrm{151}}^1$

素因数の和:275

約数の個数: 32

約数和(自身を含む): 29942784

約数和(自身を除く): 8125549

約数列:

[1, 5, 11, 37, 55, 71, 151, 185, 355, 407, 755, 781, 1661, 2035, 2627, 3905, 5587, 8305, 10721, 13135, 27935, 28897, 53605, 61457, 117931, 144485, 307285, 396677, 589655, 1983385, 4363447, 21817235]

約数ペア:

[(1, 21817235), (5, 4363447), (11, 1983385), (37, 589655), (55, 396677), (71, 307285), (151, 144485), (185, 117931), (355, 61457), (407, 53605), (755, 28897), (781, 27935), (1661, 13135), (2035, 10721), (2627, 8305), (3905, 5587)]