21978340

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{47779}}^1$

素因数の和:47811

約数の個数: 24

約数和(自身を含む): 48162240

約数和(自身を除く): 26183900

約数列:

[1, 2, 4, 5, 10, 20, 23, 46, 92, 115, 230, 460, 47779, 95558, 191116, 238895, 477790, 955580, 1098917, 2197834, 4395668, 5494585, 10989170, 21978340]

約数ペア:

[(1, 21978340), (2, 10989170), (4, 5494585), (5, 4395668), (10, 2197834), (20, 1098917), (23, 955580), (46, 477790), (92, 238895), (115, 191116), (230, 95558), (460, 47779)]