81812800

素因数分解:

$2^6\times 5^2\times {\mathrm{51133}}^1$

素因数の和:51155

約数の個数: 42

約数和(自身を含む): 201314558

約数和(自身を除く): 119501758

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 160, 200, 320, 400, 800, 1600, 51133, 102266, 204532, 255665, 409064, 511330, 818128, 1022660, 1278325, 1636256, 2045320, 2556650, 3272512, 4090640, 5113300, 8181280, 10226600, 16362560, 20453200, 40906400, 81812800]

約数ペア:

[(1, 81812800), (2, 40906400), (4, 20453200), (5, 16362560), (8, 10226600), (10, 8181280), (16, 5113300), (20, 4090640), (25, 3272512), (32, 2556650), (40, 2045320), (50, 1636256), (64, 1278325), (80, 1022660), (100, 818128), (160, 511330), (200, 409064), (320, 255665), (400, 204532), (800, 102266), (1600, 51133)]