20988121

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{1693}}^1$

素因数の和:1741

約数の個数: 24

約数和(自身を含む): 27808704

約数和(自身を除く): 6820583

約数列:

[1, 7, 11, 23, 49, 77, 161, 253, 539, 1127, 1693, 1771, 11851, 12397, 18623, 38939, 82957, 130361, 272573, 428329, 912527, 1908011, 2998303, 20988121]

約数ペア:

[(1, 20988121), (7, 2998303), (11, 1908011), (23, 912527), (49, 428329), (77, 272573), (161, 130361), (253, 82957), (539, 38939), (1127, 18623), (1693, 12397), (1771, 11851)]