21408363

素因数分解:

$3^2\times {\mathrm{109}}^1\times {\mathrm{139}}^1\times {\mathrm{157}}^1$

素因数の和:411

約数の個数: 24

約数和(自身を含む): 31631600

約数和(自身を除く): 10223237

約数列:

[1, 3, 9, 109, 139, 157, 327, 417, 471, 981, 1251, 1413, 15151, 17113, 21823, 45453, 51339, 65469, 136359, 154017, 196407, 2378707, 7136121, 21408363]

約数ペア:

[(1, 21408363), (3, 7136121), (9, 2378707), (109, 196407), (139, 154017), (157, 136359), (327, 65469), (417, 51339), (471, 45453), (981, 21823), (1251, 17113), (1413, 15151)]