21000000172

素因数分解:

$2^2\times {\mathrm{523}}^1\times {\mathrm{10038241}}^1$

素因数の和:10038768

約数の個数: 12

約数和(自身を含む): 36820271656

約数和(自身を除く): 15820271484

約数列:

[1, 2, 4, 523, 1046, 2092, 10038241, 20076482, 40152964, 5250000043, 10500000086, 21000000172]

約数ペア:

[(1, 21000000172), (2, 10500000086), (4, 5250000043), (523, 40152964), (1046, 20076482), (2092, 10038241)]