21821748

素因数分解:

$2^2\times 3^1\times {\mathrm{13}}^1\times {\mathrm{139883}}^1$

素因数の和:139903

約数の個数: 24

約数和(自身を含む): 54834528

約数和(自身を除く): 33012780

約数列:

[1, 2, 3, 4, 6, 12, 13, 26, 39, 52, 78, 156, 139883, 279766, 419649, 559532, 839298, 1678596, 1818479, 3636958, 5455437, 7273916, 10910874, 21821748]

約数ペア:

[(1, 21821748), (2, 10910874), (3, 7273916), (4, 5455437), (6, 3636958), (12, 1818479), (13, 1678596), (26, 839298), (39, 559532), (52, 419649), (78, 279766), (156, 139883)]