20040920

素因数分解:

$2^3\times 5^1\times {\mathrm{281}}^1\times {\mathrm{1783}}^1$

素因数の和:2075

約数の個数: 32

約数和(自身を含む): 45277920

約数和(自身を除く): 25237000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 281, 562, 1124, 1405, 1783, 2248, 2810, 3566, 5620, 7132, 8915, 11240, 14264, 17830, 35660, 71320, 501023, 1002046, 2004092, 2505115, 4008184, 5010230, 10020460, 20040920]

約数ペア:

[(1, 20040920), (2, 10020460), (4, 5010230), (5, 4008184), (8, 2505115), (10, 2004092), (20, 1002046), (40, 501023), (281, 71320), (562, 35660), (1124, 17830), (1405, 14264), (1783, 11240), (2248, 8915), (2810, 7132), (3566, 5620)]