21123156963

素因数分解:

$3^1\times {\mathrm{71}}^1\times {\mathrm{131}}^1\times {\mathrm{641}}^1\times {\mathrm{1181}}^1$

素因数の和:2027

約数の個数: 32

約数和(自身を含む): 28848213504

約数和(自身を除く): 7725056541

約数列:

[1, 3, 71, 131, 213, 393, 641, 1181, 1923, 3543, 9301, 27903, 45511, 83851, 83971, 136533, 154711, 251553, 251913, 464133, 757021, 2271063, 5961941, 10984481, 17885823, 32953443, 53748491, 99169751, 161245473, 297509253, 7041052321, 21123156963]

約数ペア:

[(1, 21123156963), (3, 7041052321), (71, 297509253), (131, 161245473), (213, 99169751), (393, 53748491), (641, 32953443), (1181, 17885823), (1923, 10984481), (3543, 5961941), (9301, 2271063), (27903, 757021), (45511, 464133), (83851, 251913), (83971, 251553), (136533, 154711)]