21000980245

素因数分解:

$5^1\times 7^1\times {\mathrm{1201}}^1\times {\mathrm{499607}}^1$

素因数の和:500820

約数の個数: 16

約数和(自身を含む): 28825383168

約数和(自身を除く): 7824402923

約数列:

[1, 5, 7, 35, 1201, 6005, 8407, 42035, 499607, 2498035, 3497249, 17486245, 600028007, 3000140035, 4200196049, 21000980245]

約数ペア:

[(1, 21000980245), (5, 4200196049), (7, 3000140035), (35, 600028007), (1201, 17486245), (6005, 3497249), (8407, 2498035), (42035, 499607)]