21681760

素因数分解:

$2^5\times 5^1\times {\mathrm{135511}}^1$

素因数の和:135526

約数の個数: 24

約数和(自身を含む): 51223536

約数和(自身を除く): 29541776

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 135511, 271022, 542044, 677555, 1084088, 1355110, 2168176, 2710220, 4336352, 5420440, 10840880, 21681760]

約数ペア:

[(1, 21681760), (2, 10840880), (4, 5420440), (5, 4336352), (8, 2710220), (10, 2168176), (16, 1355110), (20, 1084088), (32, 677555), (40, 542044), (80, 271022), (160, 135511)]