28817420

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{13219}}^1$

素因数の和:13337

約数の個数: 24

約数和(自身を含む): 61076400

約数和(自身を除く): 32258980

約数列:

[1, 2, 4, 5, 10, 20, 109, 218, 436, 545, 1090, 2180, 13219, 26438, 52876, 66095, 132190, 264380, 1440871, 2881742, 5763484, 7204355, 14408710, 28817420]

約数ペア:

[(1, 28817420), (2, 14408710), (4, 7204355), (5, 5763484), (10, 2881742), (20, 1440871), (109, 264380), (218, 132190), (436, 66095), (545, 52876), (1090, 26438), (2180, 13219)]