21130760

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{10781}}^1$

素因数の和:10806

約数の個数: 48

約数和(自身を含む): 55311660

約数和(自身を除く): 34180900

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 56, 70, 98, 140, 196, 245, 280, 392, 490, 980, 1960, 10781, 21562, 43124, 53905, 75467, 86248, 107810, 150934, 215620, 301868, 377335, 431240, 528269, 603736, 754670, 1056538, 1509340, 2113076, 2641345, 3018680, 4226152, 5282690, 10565380, 21130760]

約数ペア:

[(1, 21130760), (2, 10565380), (4, 5282690), (5, 4226152), (7, 3018680), (8, 2641345), (10, 2113076), (14, 1509340), (20, 1056538), (28, 754670), (35, 603736), (40, 528269), (49, 431240), (56, 377335), (70, 301868), (98, 215620), (140, 150934), (196, 107810), (245, 86248), (280, 75467), (392, 53905), (490, 43124), (980, 21562), (1960, 10781)]