21263525

素因数分解:

$5^2\times {\mathrm{29}}^1\times {\mathrm{139}}^1\times {\mathrm{211}}^1$

素因数の和:389

約数の個数: 24

約数和(自身を含む): 27602400

約数和(自身を除く): 6338875

約数列:

[1, 5, 25, 29, 139, 145, 211, 695, 725, 1055, 3475, 4031, 5275, 6119, 20155, 29329, 30595, 100775, 146645, 152975, 733225, 850541, 4252705, 21263525]

約数ペア:

[(1, 21263525), (5, 4252705), (25, 850541), (29, 733225), (139, 152975), (145, 146645), (211, 100775), (695, 30595), (725, 29329), (1055, 20155), (3475, 6119), (4031, 5275)]