21051405

素因数分解:

$3^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{7669}}^1$

素因数の和:7741

約数の個数: 24

約数和(自身を含む): 37092120

約数和(自身を除く): 16040715

約数列:

[1, 3, 5, 9, 15, 45, 61, 183, 305, 549, 915, 2745, 7669, 23007, 38345, 69021, 115035, 345105, 467809, 1403427, 2339045, 4210281, 7017135, 21051405]

約数ペア:

[(1, 21051405), (3, 7017135), (5, 4210281), (9, 2339045), (15, 1403427), (45, 467809), (61, 345105), (183, 115035), (305, 69021), (549, 38345), (915, 23007), (2745, 7669)]