25315960

素因数分解:

$2^3\times 5^1\times {\mathrm{491}}^1\times {\mathrm{1289}}^1$

素因数の和:1791

約数の個数: 32

約数和(自身を含む): 57121200

約数和(自身を除く): 31805240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 491, 982, 1289, 1964, 2455, 2578, 3928, 4910, 5156, 6445, 9820, 10312, 12890, 19640, 25780, 51560, 632899, 1265798, 2531596, 3164495, 5063192, 6328990, 12657980, 25315960]

約数ペア:

[(1, 25315960), (2, 12657980), (4, 6328990), (5, 5063192), (8, 3164495), (10, 2531596), (20, 1265798), (40, 632899), (491, 51560), (982, 25780), (1289, 19640), (1964, 12890), (2455, 10312), (2578, 9820), (3928, 6445), (4910, 5156)]