20784800

素因数分解:

$2^5\times 5^2\times {\mathrm{25981}}^1$

素因数の和:26001

約数の個数: 36

約数和(自身を含む): 50742846

約数和(自身を除く): 29958046

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 160, 200, 400, 800, 25981, 51962, 103924, 129905, 207848, 259810, 415696, 519620, 649525, 831392, 1039240, 1299050, 2078480, 2598100, 4156960, 5196200, 10392400, 20784800]

約数ペア:

[(1, 20784800), (2, 10392400), (4, 5196200), (5, 4156960), (8, 2598100), (10, 2078480), (16, 1299050), (20, 1039240), (25, 831392), (32, 649525), (40, 519620), (50, 415696), (80, 259810), (100, 207848), (160, 129905), (200, 103924), (400, 51962), (800, 25981)]