16638979

素因数分解:

$7^2\times {\mathrm{43}}^1\times {\mathrm{53}}^1\times {\mathrm{149}}^1$

素因数の和:259

約数の個数: 24

約数和(自身を含む): 20314800

約数和(自身を除く): 3675821

約数列:

[1, 7, 43, 49, 53, 149, 301, 371, 1043, 2107, 2279, 2597, 6407, 7301, 7897, 15953, 44849, 55279, 111671, 313943, 339571, 386953, 2376997, 16638979]

約数ペア:

[(1, 16638979), (7, 2376997), (43, 386953), (49, 339571), (53, 313943), (149, 111671), (301, 55279), (371, 44849), (1043, 15953), (2107, 7897), (2279, 7301), (2597, 6407)]