20945840

素因数分解:

$2^4\times 5^1\times {\mathrm{261823}}^1$

素因数の和:261836

約数の個数: 20

約数和(自身を含む): 48699264

約数和(自身を除く): 27753424

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 261823, 523646, 1047292, 1309115, 2094584, 2618230, 4189168, 5236460, 10472920, 20945840]

約数ペア:

[(1, 20945840), (2, 10472920), (4, 5236460), (5, 4189168), (8, 2618230), (10, 2094584), (16, 1309115), (20, 1047292), (40, 523646), (80, 261823)]