686313

素因数分解:

$3^4\times {\mathrm{37}}^1\times {\mathrm{229}}^1$

素因数の和:278

約数の個数: 20

約数和(自身を含む): 1057540

約数和(自身を除く): 371227

約数列:

[1, 3, 9, 27, 37, 81, 111, 229, 333, 687, 999, 2061, 2997, 6183, 8473, 18549, 25419, 76257, 228771, 686313]

約数ペア:

[(1, 686313), (3, 228771), (9, 76257), (27, 25419), (37, 18549), (81, 8473), (111, 6183), (229, 2997), (333, 2061), (687, 999)]