21217105

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^2\times {\mathrm{17}}^1\times {\mathrm{211}}^1$

素因数の和:266

約数の個数: 48

約数和(自身を含む): 33519744

約数和(自身を除く): 12302639

約数列:

[1, 5, 7, 13, 17, 35, 65, 85, 91, 119, 169, 211, 221, 455, 595, 845, 1055, 1105, 1183, 1477, 1547, 2743, 2873, 3587, 5915, 7385, 7735, 13715, 14365, 17935, 19201, 20111, 25109, 35659, 46631, 96005, 100555, 125545, 178295, 233155, 249613, 326417, 606203, 1248065, 1632085, 3031015, 4243421, 21217105]

約数ペア:

[(1, 21217105), (5, 4243421), (7, 3031015), (13, 1632085), (17, 1248065), (35, 606203), (65, 326417), (85, 249613), (91, 233155), (119, 178295), (169, 125545), (211, 100555), (221, 96005), (455, 46631), (595, 35659), (845, 25109), (1055, 20111), (1105, 19201), (1183, 17935), (1477, 14365), (1547, 13715), (2743, 7735), (2873, 7385), (3587, 5915)]