21581650

素因数分解:

$2^1\times 5^2\times {\mathrm{653}}^1\times {\mathrm{661}}^1$

素因数の和:1326

約数の個数: 24

約数和(自身を含む): 40264164

約数和(自身を除く): 18682514

約数列:

[1, 2, 5, 10, 25, 50, 653, 661, 1306, 1322, 3265, 3305, 6530, 6610, 16325, 16525, 32650, 33050, 431633, 863266, 2158165, 4316330, 10790825, 21581650]

約数ペア:

[(1, 21581650), (2, 10790825), (5, 4316330), (10, 2158165), (25, 863266), (50, 431633), (653, 33050), (661, 32650), (1306, 16525), (1322, 16325), (3265, 6610), (3305, 6530)]