19181813

素因数分解:

$7^1\times {\mathrm{53}}^1\times {\mathrm{149}}^1\times {\mathrm{347}}^1$

素因数の和:556

約数の個数: 16

約数和(自身を含む): 22550400

約数和(自身を除く): 3368587

約数列:

[1, 7, 53, 149, 347, 371, 1043, 2429, 7897, 18391, 51703, 55279, 128737, 361921, 2740259, 19181813]

約数ペア:

[(1, 19181813), (7, 2740259), (53, 361921), (149, 128737), (347, 55279), (371, 51703), (1043, 18391), (2429, 7897)]