20806400

素因数分解:

$2^8\times 5^2\times {\mathrm{3251}}^1$

素因数の和:3277

約数の個数: 54

約数和(自身を含む): 51514932

約数和(自身を除く): 30708532

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 128, 160, 200, 256, 320, 400, 640, 800, 1280, 1600, 3200, 3251, 6400, 6502, 13004, 16255, 26008, 32510, 52016, 65020, 81275, 104032, 130040, 162550, 208064, 260080, 325100, 416128, 520160, 650200, 832256, 1040320, 1300400, 2080640, 2600800, 4161280, 5201600, 10403200, 20806400]

約数ペア:

[(1, 20806400), (2, 10403200), (4, 5201600), (5, 4161280), (8, 2600800), (10, 2080640), (16, 1300400), (20, 1040320), (25, 832256), (32, 650200), (40, 520160), (50, 416128), (64, 325100), (80, 260080), (100, 208064), (128, 162550), (160, 130040), (200, 104032), (256, 81275), (320, 65020), (400, 52016), (640, 32510), (800, 26008), (1280, 16255), (1600, 13004), (3200, 6502), (3251, 6400)]