20108800

素因数分解:

$2^9\times 5^2\times {\mathrm{1571}}^1$

素因数の和:1599

約数の個数: 60

約数和(自身を含む): 49852836

約数和(自身を除く): 29744036

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, 1280, 1571, 1600, 2560, 3142, 3200, 6284, 6400, 7855, 12568, 12800, 15710, 25136, 31420, 39275, 50272, 62840, 78550, 100544, 125680, 157100, 201088, 251360, 314200, 402176, 502720, 628400, 804352, 1005440, 1256800, 2010880, 2513600, 4021760, 5027200, 10054400, 20108800]

約数ペア:

[(1, 20108800), (2, 10054400), (4, 5027200), (5, 4021760), (8, 2513600), (10, 2010880), (16, 1256800), (20, 1005440), (25, 804352), (32, 628400), (40, 502720), (50, 402176), (64, 314200), (80, 251360), (100, 201088), (128, 157100), (160, 125680), (200, 100544), (256, 78550), (320, 62840), (400, 50272), (512, 39275), (640, 31420), (800, 25136), (1280, 15710), (1571, 12800), (1600, 12568), (2560, 7855), (3142, 6400), (3200, 6284)]