21017600

素因数分解:

$2^{10}\times 5^2\times {\mathrm{821}}^1$

素因数の和:851

約数の個数: 66

約数和(自身を含む): 52161654

約数和(自身を除く): 31144054

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, 800, 821, 1024, 1280, 1600, 1642, 2560, 3200, 3284, 4105, 5120, 6400, 6568, 8210, 12800, 13136, 16420, 20525, 25600, 26272, 32840, 41050, 52544, 65680, 82100, 105088, 131360, 164200, 210176, 262720, 328400, 420352, 525440, 656800, 840704, 1050880, 1313600, 2101760, 2627200, 4203520, 5254400, 10508800, 21017600]

約数ペア:

[(1, 21017600), (2, 10508800), (4, 5254400), (5, 4203520), (8, 2627200), (10, 2101760), (16, 1313600), (20, 1050880), (25, 840704), (32, 656800), (40, 525440), (50, 420352), (64, 328400), (80, 262720), (100, 210176), (128, 164200), (160, 131360), (200, 105088), (256, 82100), (320, 65680), (400, 52544), (512, 41050), (640, 32840), (800, 26272), (821, 25600), (1024, 20525), (1280, 16420), (1600, 13136), (1642, 12800), (2560, 8210), (3200, 6568), (3284, 6400), (4105, 5120)]