21721362

素因数分解:

$2^1\times 3^1\times {\mathrm{13}}^1\times {\mathrm{278479}}^1$

素因数の和:278497

約数の個数: 16

約数和(自身を含む): 46784640

約数和(自身を除く): 25063278

約数列:

[1, 2, 3, 6, 13, 26, 39, 78, 278479, 556958, 835437, 1670874, 3620227, 7240454, 10860681, 21721362]

約数ペア:

[(1, 21721362), (2, 10860681), (3, 7240454), (6, 3620227), (13, 1670874), (26, 835437), (39, 556958), (78, 278479)]