28121090

素因数分解:

$2^1\times 5^1\times {\mathrm{139}}^1\times {\mathrm{20231}}^1$

素因数の和:20377

約数の個数: 16

約数和(自身を含む): 50984640

約数和(自身を除く): 22863550

約数列:

[1, 2, 5, 10, 139, 278, 695, 1390, 20231, 40462, 101155, 202310, 2812109, 5624218, 14060545, 28121090]

約数ペア:

[(1, 28121090), (2, 14060545), (5, 5624218), (10, 2812109), (139, 202310), (278, 101155), (695, 40462), (1390, 20231)]