81612800

素因数分解:

$2^{12}\times 5^2\times {\mathrm{797}}^1$

素因数の和:831

約数の個数: 78

約数和(自身を含む): 202628958

約数和(自身を除く): 121016158

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 128, 160, 200, 256, 320, 400, 512, 640, 797, 800, 1024, 1280, 1594, 1600, 2048, 2560, 3188, 3200, 3985, 4096, 5120, 6376, 6400, 7970, 10240, 12752, 12800, 15940, 19925, 20480, 25504, 25600, 31880, 39850, 51008, 51200, 63760, 79700, 102016, 102400, 127520, 159400, 204032, 255040, 318800, 408064, 510080, 637600, 816128, 1020160, 1275200, 1632256, 2040320, 2550400, 3264512, 4080640, 5100800, 8161280, 10201600, 16322560, 20403200, 40806400, 81612800]

約数ペア:

[(1, 81612800), (2, 40806400), (4, 20403200), (5, 16322560), (8, 10201600), (10, 8161280), (16, 5100800), (20, 4080640), (25, 3264512), (32, 2550400), (40, 2040320), (50, 1632256), (64, 1275200), (80, 1020160), (100, 816128), (128, 637600), (160, 510080), (200, 408064), (256, 318800), (320, 255040), (400, 204032), (512, 159400), (640, 127520), (797, 102400), (800, 102016), (1024, 79700), (1280, 63760), (1594, 51200), (1600, 51008), (2048, 39850), (2560, 31880), (3188, 25600), (3200, 25504), (3985, 20480), (4096, 19925), (5120, 15940), (6376, 12800), (6400, 12752), (7970, 10240)]