557109

素因数分解:

$3^2\times 7^1\times {\mathrm{37}}^1\times {\mathrm{239}}^1$

素因数の和:289

約数の個数: 24

約数和(自身を含む): 948480

約数和(自身を除く): 391371

約数列:

[1, 3, 7, 9, 21, 37, 63, 111, 239, 259, 333, 717, 777, 1673, 2151, 2331, 5019, 8843, 15057, 26529, 61901, 79587, 185703, 557109]

約数ペア:

[(1, 557109), (3, 185703), (7, 79587), (9, 61901), (21, 26529), (37, 15057), (63, 8843), (111, 5019), (239, 2331), (259, 2151), (333, 1673), (717, 777)]