20457728

素因数分解:

$2^8\times {\mathrm{157}}^1\times {\mathrm{509}}^1$

素因数の和:682

約数の個数: 36

約数和(自身を含む): 41176380

約数和(自身を除く): 20718652

約数列:

[1, 2, 4, 8, 16, 32, 64, 128, 157, 256, 314, 509, 628, 1018, 1256, 2036, 2512, 4072, 5024, 8144, 10048, 16288, 20096, 32576, 40192, 65152, 79913, 130304, 159826, 319652, 639304, 1278608, 2557216, 5114432, 10228864, 20457728]

約数ペア:

[(1, 20457728), (2, 10228864), (4, 5114432), (8, 2557216), (16, 1278608), (32, 639304), (64, 319652), (128, 159826), (157, 130304), (256, 79913), (314, 65152), (509, 40192), (628, 32576), (1018, 20096), (1256, 16288), (2036, 10048), (2512, 8144), (4072, 5024)]