389804980

素因数分解:

$2^2\times 5^1\times {\mathrm{3943}}^1\times {\mathrm{4943}}^1$

素因数の和:8895

約数の個数: 24

約数和(自身を含む): 818963712

約数和(自身を除く): 429158732

約数列:

[1, 2, 4, 5, 10, 20, 3943, 4943, 7886, 9886, 15772, 19715, 19772, 24715, 39430, 49430, 78860, 98860, 19490249, 38980498, 77960996, 97451245, 194902490, 389804980]

約数ペア:

[(1, 389804980), (2, 194902490), (4, 97451245), (5, 77960996), (10, 38980498), (20, 19490249), (3943, 98860), (4943, 78860), (7886, 49430), (9886, 39430), (15772, 24715), (19715, 19772)]