21338863

素因数分解:

$7^2\times {\mathrm{13}}^1\times {\mathrm{139}}^1\times {\mathrm{241}}^1$

素因数の和:407

約数の個数: 24

約数和(自身を含む): 27036240

約数和(自身を除く): 5697377

約数列:

[1, 7, 13, 49, 91, 139, 241, 637, 973, 1687, 1807, 3133, 6811, 11809, 12649, 21931, 33499, 88543, 153517, 234493, 435487, 1641451, 3048409, 21338863]

約数ペア:

[(1, 21338863), (7, 3048409), (13, 1641451), (49, 435487), (91, 234493), (139, 153517), (241, 88543), (637, 33499), (973, 21931), (1687, 12649), (1807, 11809), (3133, 6811)]