21105440

素因数分解:

$2^5\times 5^1\times {\mathrm{131909}}^1$

素因数の和:131924

約数の個数: 24

約数和(自身を含む): 49861980

約数和(自身を除く): 28756540

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 131909, 263818, 527636, 659545, 1055272, 1319090, 2110544, 2638180, 4221088, 5276360, 10552720, 21105440]

約数ペア:

[(1, 21105440), (2, 10552720), (4, 5276360), (5, 4221088), (8, 2638180), (10, 2110544), (16, 1319090), (20, 1055272), (32, 659545), (40, 527636), (80, 263818), (160, 131909)]