21978940

素因数分解:

$2^2\times 5^1\times {\mathrm{683}}^1\times {\mathrm{1609}}^1$

素因数の和:2301

約数の個数: 24

約数和(自身を含む): 46252080

約数和(自身を除く): 24273140

約数列:

[1, 2, 4, 5, 10, 20, 683, 1366, 1609, 2732, 3218, 3415, 6436, 6830, 8045, 13660, 16090, 32180, 1098947, 2197894, 4395788, 5494735, 10989470, 21978940]

約数ペア:

[(1, 21978940), (2, 10989470), (4, 5494735), (5, 4395788), (10, 2197894), (20, 1098947), (683, 32180), (1366, 16090), (1609, 13660), (2732, 8045), (3218, 6830), (3415, 6436)]