65286400

素因数分解:

$2^8\times 5^2\times {\mathrm{101}}^2$

素因数の和:228

約数の個数: 81

約数和(自身を含む): 163209823

約数和(自身を除く): 97923423

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 101, 128, 160, 200, 202, 256, 320, 400, 404, 505, 640, 800, 808, 1010, 1280, 1600, 1616, 2020, 2525, 3200, 3232, 4040, 5050, 6400, 6464, 8080, 10100, 10201, 12928, 16160, 20200, 20402, 25856, 32320, 40400, 40804, 51005, 64640, 80800, 81608, 102010, 129280, 161600, 163216, 204020, 255025, 323200, 326432, 408040, 510050, 646400, 652864, 816080, 1020100, 1305728, 1632160, 2040200, 2611456, 3264320, 4080400, 6528640, 8160800, 13057280, 16321600, 32643200, 65286400]

約数ペア:

[(1, 65286400), (2, 32643200), (4, 16321600), (5, 13057280), (8, 8160800), (10, 6528640), (16, 4080400), (20, 3264320), (25, 2611456), (32, 2040200), (40, 1632160), (50, 1305728), (64, 1020100), (80, 816080), (100, 652864), (101, 646400), (128, 510050), (160, 408040), (200, 326432), (202, 323200), (256, 255025), (320, 204020), (400, 163216), (404, 161600), (505, 129280), (640, 102010), (800, 81608), (808, 80800), (1010, 64640), (1280, 51005), (1600, 40804), (1616, 40400), (2020, 32320), (2525, 25856), (3200, 20402), (3232, 20200), (4040, 16160), (5050, 12928), (6400, 10201), (6464, 10100)]