21052005

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{2297}}^1$

素因数の和:2365

約数の個数: 32

約数和(自身を含む): 37062144

約数和(自身を除く): 16010139

約数列:

[1, 3, 5, 13, 15, 39, 47, 65, 141, 195, 235, 611, 705, 1833, 2297, 3055, 6891, 9165, 11485, 29861, 34455, 89583, 107959, 149305, 323877, 447915, 539795, 1403467, 1619385, 4210401, 7017335, 21052005]

約数ペア:

[(1, 21052005), (3, 7017335), (5, 4210401), (13, 1619385), (15, 1403467), (39, 539795), (47, 447915), (65, 323877), (141, 149305), (195, 107959), (235, 89583), (611, 34455), (705, 29861), (1833, 11485), (2297, 9165), (3055, 6891)]