20395865

素因数分解:

$5^1\times 7^1\times {\mathrm{149}}^1\times {\mathrm{3911}}^1$

素因数の和:4072

約数の個数: 16

約数和(自身を含む): 28166400

約数和(自身を除く): 7770535

約数列:

[1, 5, 7, 35, 149, 745, 1043, 3911, 5215, 19555, 27377, 136885, 582739, 2913695, 4079173, 20395865]

約数ペア:

[(1, 20395865), (5, 4079173), (7, 2913695), (35, 582739), (149, 136885), (745, 27377), (1043, 19555), (3911, 5215)]