21456800

素因数分解:

$2^5\times 5^2\times {\mathrm{26821}}^1$

素因数の和:26841

約数の個数: 36

約数和(自身を含む): 52383366

約数和(自身を除く): 30926566

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 160, 200, 400, 800, 26821, 53642, 107284, 134105, 214568, 268210, 429136, 536420, 670525, 858272, 1072840, 1341050, 2145680, 2682100, 4291360, 5364200, 10728400, 21456800]

約数ペア:

[(1, 21456800), (2, 10728400), (4, 5364200), (5, 4291360), (8, 2682100), (10, 2145680), (16, 1341050), (20, 1072840), (25, 858272), (32, 670525), (40, 536420), (50, 429136), (80, 268210), (100, 214568), (160, 134105), (200, 107284), (400, 53642), (800, 26821)]