21785995

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{797}}^1$

素因数の和:891

約数の個数: 32

約数和(自身を含む): 33094656

約数和(自身を除く): 11308661

約数列:

[1, 5, 7, 11, 35, 55, 71, 77, 355, 385, 497, 781, 797, 2485, 3905, 3985, 5467, 5579, 8767, 27335, 27895, 43835, 56587, 61369, 282935, 306845, 396109, 622457, 1980545, 3112285, 4357199, 21785995]

約数ペア:

[(1, 21785995), (5, 4357199), (7, 3112285), (11, 1980545), (35, 622457), (55, 396109), (71, 306845), (77, 282935), (355, 61369), (385, 56587), (497, 43835), (781, 27895), (797, 27335), (2485, 8767), (3905, 5579), (3985, 5467)]