21217357

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{5501}}^1$

素因数の和:5556

約数の個数: 16

約数和(自身を含む): 26409600

約数和(自身を除く): 5192243

約数列:

[1, 7, 19, 29, 133, 203, 551, 3857, 5501, 38507, 104519, 159529, 731633, 1116703, 3031051, 21217357]

約数ペア:

[(1, 21217357), (7, 3031051), (19, 1116703), (29, 731633), (133, 159529), (203, 104519), (551, 38507), (3857, 5501)]