21275838

素因数分解:

$2^1\times 3^3\times {\mathrm{393997}}^1$

素因数の和:394008

約数の個数: 16

約数和(自身を含む): 47279760

約数和(自身を除く): 26003922

約数列:

[1, 2, 3, 6, 9, 18, 27, 54, 393997, 787994, 1181991, 2363982, 3545973, 7091946, 10637919, 21275838]

約数ペア:

[(1, 21275838), (2, 10637919), (3, 7091946), (6, 3545973), (9, 2363982), (18, 1181991), (27, 787994), (54, 393997)]