21379988

素因数分解:

$2^2\times 7^1\times {\mathrm{53}}^1\times {\mathrm{14407}}^1$

素因数の和:14471

約数の個数: 24

約数和(自身を含む): 43569792

約数和(自身を除く): 22189804

約数列:

[1, 2, 4, 7, 14, 28, 53, 106, 212, 371, 742, 1484, 14407, 28814, 57628, 100849, 201698, 403396, 763571, 1527142, 3054284, 5344997, 10689994, 21379988]

約数ペア:

[(1, 21379988), (2, 10689994), (4, 5344997), (7, 3054284), (14, 1527142), (28, 763571), (53, 403396), (106, 201698), (212, 100849), (371, 57628), (742, 28814), (1484, 14407)]