20507140

素因数分解:

$2^2\times 5^1\times {\mathrm{401}}^1\times {\mathrm{2557}}^1$

素因数の和:2967

約数の個数: 24

約数和(自身を含む): 43189272

約数和(自身を除く): 22682132

約数列:

[1, 2, 4, 5, 10, 20, 401, 802, 1604, 2005, 2557, 4010, 5114, 8020, 10228, 12785, 25570, 51140, 1025357, 2050714, 4101428, 5126785, 10253570, 20507140]

約数ペア:

[(1, 20507140), (2, 10253570), (4, 5126785), (5, 4101428), (10, 2050714), (20, 1025357), (401, 51140), (802, 25570), (1604, 12785), (2005, 10228), (2557, 8020), (4010, 5114)]