28127421

素因数分解:

$3^2\times 7^2\times {\mathrm{63781}}^1$

素因数の和:63801

約数の個数: 18

約数和(自身を含む): 47262462

約数和(自身を除く): 19135041

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 63781, 191343, 446467, 574029, 1339401, 3125269, 4018203, 9375807, 28127421]

約数ペア:

[(1, 28127421), (3, 9375807), (7, 4018203), (9, 3125269), (21, 1339401), (49, 574029), (63, 446467), (147, 191343), (441, 63781)]