2990421

素因数分解:

$3^2\times 7^2\times {\mathrm{6781}}^1$

素因数の和:6801

約数の個数: 18

約数和(自身を含む): 5025462

約数和(自身を除く): 2035041

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 6781, 20343, 47467, 61029, 142401, 332269, 427203, 996807, 2990421]

約数ペア:

[(1, 2990421), (3, 996807), (7, 427203), (9, 332269), (21, 142401), (49, 61029), (63, 47467), (147, 20343), (441, 6781)]