16661421

素因数分解:

$3^2\times 7^2\times {\mathrm{37781}}^1$

素因数の和:37801

約数の個数: 18

約数和(自身を含む): 27996462

約数和(自身を除く): 11335041

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 37781, 113343, 264467, 340029, 793401, 1851269, 2380203, 5553807, 16661421]

約数ペア:

[(1, 16661421), (3, 5553807), (7, 2380203), (9, 1851269), (21, 793401), (49, 340029), (63, 264467), (147, 113343), (441, 37781)]