21000403664

素因数分解:

$2^4\times {\mathrm{4481}}^1\times {\mathrm{292909}}^1$

素因数の和:297398

約数の個数: 20

約数和(自身を含む): 40697501220

約数和(自身を除く): 19697097556

約数列:

[1, 2, 4, 8, 16, 4481, 8962, 17924, 35848, 71696, 292909, 585818, 1171636, 2343272, 4686544, 1312525229, 2625050458, 5250100916, 10500201832, 21000403664]

約数ペア:

[(1, 21000403664), (2, 10500201832), (4, 5250100916), (8, 2625050458), (16, 1312525229), (4481, 4686544), (8962, 2343272), (17924, 1171636), (35848, 585818), (71696, 292909)]