20485760

素因数分解:

$2^7\times 5^1\times {\mathrm{32009}}^1$

素因数の和:32028

約数の個数: 32

約数和(自身を含む): 48975300

約数和(自身を除く): 28489540

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 32009, 64018, 128036, 160045, 256072, 320090, 512144, 640180, 1024288, 1280360, 2048576, 2560720, 4097152, 5121440, 10242880, 20485760]

約数ペア:

[(1, 20485760), (2, 10242880), (4, 5121440), (5, 4097152), (8, 2560720), (10, 2048576), (16, 1280360), (20, 1024288), (32, 640180), (40, 512144), (64, 320090), (80, 256072), (128, 160045), (160, 128036), (320, 64018), (640, 32009)]